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業績リスト

最終更新日：2020年2月26日

2020
2019 2018 2017 2016 2015 2014 2013 2012 2011 2010
2009 2008 2007 2006 2005 2004 2003 2002 2001 2000
1999 1998 1997 1996 1995 1994 1993

- 2020 -

  1. Y. Ohno, H. Yoshida, N. Kamiuchi, R. Aso, S. Takeda, Y. Shimizu, Y. Nagai, J. Liang, and N. Shigekawa: Japanese Journal of Applied Physics, Vol. 59, SBBB05 (5 pages) (2020), “Impact of focused ion beam on structural and compositional analysis of interfaces fabricated by surface activated bonding.”

  2. S. Kanda, Y. Shimizu, Y. Ohno, K. Shirasaki, Y. Nagai, M. Kasu, N. Shigekawa, and J. Liang: Japanese Journal of Applied Physics, Vol. 59, SBBB03 (5 pages) (2020), “Fabrication of diamond/Cu direct bonding for power device applications.”

  3. R. Kiga, S. Hayashi, S. Miyamoto, Y. Shimizu, Y. Nagai, T. Endoh, and K. M.Itoh: Journal of Applied Physics, Vol. 127, Issue 4, 045704 (6pages) (2020), "Oxidation-enhanced Si self-diffusion in isotopically modulated silicon nanopillars."

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- 2019 -

  1. Y. Tong, D. Chen, B. Han, J. Wang, R. Feng, T. Yang, C. Zhao, Y. L. Zhao, W.Guo, Y. Shimizu, C. T. Liu, P. K. Liaw, K. Inoue, Y. Nagai, A. Hu, and J. J.Kai: Acta Mater. 165 (2019) 228-240, “Outstanding tensile properties of a precipitation-strengthened FeCoNiCrTi0.2 high-entropy alloy at room and cryogenic temperatures.”

  2. K. Yoshida, X. Zhang, Y. Shimada, Y. Nagai, T. Hiroyama, N. Tanaka, L. Lari, M.R. Ward, E.D. Boyes, P.L. Gai: Nanotechnology 30 (2019) 175701, “Influence of gas environment and heating on atomic structures of platinum nanoparticle catalysts for proton-exchange membrane fuel cells.”

  3. Y.F. Zhang, Q. Zhan, S. Onuki, A. Kimura, F.R. Wan, K. Yoshida, Y. Nagai: J. Nucl. Mater. 517 (2019) 1-8, “Radiation-hardening and nano-cluster formation in neutron-irradiated 9Cr-2W low activation steels with different Si contents.”

  4. M. Tane, H. Nishiyama, A. Umeda, N.L. Okamoto, K. Inoue, M. Luckabauer, Y. Nagai, T. Sekino, T. Nakano, and T. Ichitsubo: Phys. Rev. Materials 3 (2019) 043604, “Diffusionless isothermal omega transformation in titanium alloys driven by quenched-in compositional fluctuations.”

  5. Y. Dong, A. Etienne, A. Frolov, S. Fedotova, K. Fujii, K. Fukuya, C. Hatzoglou, E. Kuleshova, K. Lindgren, A. London, A. Lopez, S. Lozano-Perez, Y. Miyahara, Y. Nagai, K. Nishida, B. Radiguet, D.K. Schreiber, N. Soneda, M. Thuvander, T. Toyama, J. Wang, F. Sefta, P. Chou and E. A. Marquis: Microscopy and Microanalysis 25 (2019) 356-366, “Atom Probe Tomography Interlaboratory Study on Clustering Analysis in Experimental Data Using the Maximum Separation Distance Approach.”

  6. Y. Shimada, K. Yoshida , K. Inoue, T. Shiraishi, T. Kiguchi, Y. Nagai and T.J. Konno: Microscopy (2019) 271-278, “Evaluation of spatial and temporal resolution on in situ annealing aberration-corrected transmission electron microscopy with proportional-integral-differential controller.”

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- 2018 -

  1. T. Toyama, K. Ami, K. Inoue, Y. Nagai, K. Sato, Q, Xu, Y, Hatano: J. Nucl. Mater. 499 (2018) 464-470, “Deuterium trapping at vacancy clusters in electron/neutron-irradiated tungsten studied by positron annihilation spectroscopy.”

  2. Y. Tu, B. Han, Y. Shimizu, Y. Kunimune, Y. Shimada, T. Katayama, T. Ide, M. Inoue, F. Yano, K. Inoue, Y. Nagai: Appl. Phys. Lett. 112 (2018) 032902-1-5, “Blocking of deuterium diffusion in poly-Si/Al2O3/HfxSi1-xO2/SiO2 high-k stacks as evidenced by atom probe tomography.”

  3. B. Han, J. Wei, Y. Tong, D. Chen, Y. Zhao, J. Wang, F. He, T. Yang, C. Zhao, Y. Shimizu, K. Inoue, Y. Nagai, A. Hu, C.-T. Liu, and J.-J. Kai: Scripta Materialia, 148 (2018) 42-46, “Composition evolution of gamma prime nanoparticles in the Ti-doped CoFeCrNi high entropy alloy.”

  4. A. D. Giddings, S. Koelling, Y. Shimizu, R. Estivill, K. Inoue, W. Vandervorst, and W. K. Yeoh: Scripta Materialia, 148 (2018) 82-90,”Industrial application of atom probe tomography to semiconductor devices.”

  5. M. Shimodaira, T. Toyama, K. Yoshida, K. Inoue, N. Ebisawa, K. Tomura, T. Yoshiie, M. K. Konstantinovic, R. Gerard, Y. Nagai: Acta Mater. 155 (2018) 402-409, “Contribution of irradiation-induced defects to hardening of a low-copper reactor pressure vessel steel.”

  6. T. Hwang, A. Hasegawa, K. Tomura, N. Ebisawa, T. Toyama, Y. Nagai, M. Makoto, T. Miyazawa, T. Tanaka, S. Nogami: J. Nucl. Mater. 507 (2018) 78-86, “Effect of neutron irradiation on rhenium cluster formation in tungsten and tungsten-rhenium alloys.”

  7. Y. Tu, Y. Shimizu, Y. Kunimune, Y. Shimada, T. Katayama, T. Ide, M. Inoue, F. Yano, K. Inoue, and Y. Nagai: J. Appl. Phys. 124 (2018) 155702, “Effect of carbon on boron diffusion and clustering in silicon: Temperature dependence study.”

-Proceedings-

  1. Y. Shimizu, Y. Tu, A. Abdelghafar, M. Yano, Y. Suzuki, T. Tanii, T. Shinada, E. Prati, M. Celebrano, M. Finazzi, L. Ghirardini, K. Inoue, and Y. Nagai: “Atom probe study of erbium and oxygen co-implanted silicon,” Proceedings of 2017 Silicon Nanoelectronics Workshop, 2017 pp. 99-100

  2. E. Prati, M. Celebrano, L. Ghirardini, P. Biagioni, M. Finazzi, Y. Shimizu, Y. Tu, K. Inoue, Y. Nagai, T. Shinada, Y. Chiba, A. Abdelghafar, M. Yano, and T.Tanii: “Revisiting room-temperature 1.54 µm photoluminescence of ErOx centers in silicon at extremely low concentration,” Proceedings of 2017 Silicon Nanoelectronics Workshop, 2017 pp. 105-106

  3. E. A. Marquis, V. Araullo-Peters, Y. Dong, A. Etienne, S. Fedotova, K. Fujii, K. Fukuya, E. Kuleshova, A. Lopez, A. London, S. Lozano-Perez, Y. Nagai, K. Nishida, B. Radiguet, D. Schreiber, N. Soneda, M. Thuvander, T. Toyama, F. Sefta, P. Chou: Proceedings of the 18th International Conference on Environmental Degradation of Materials in Nuclear Power Systems - Water Reactors pp 2097-2113 “On the Use of Density-Based Algorithms for the Analysis of Solute Clustering in Atom Probe Tomography Data.”

-解説-

  1. 井上耕治、永井康介：「陽電子消滅2光子角相関法」、陽電子科学、11(2018)11-24.

  2. 外山健、吉田健太：「連載講座　原子力材料評価のための最新ナノミクロ分析技術の新展開　第1回　3D-AP/ウィーク・ビームSTEMによるナノ組織解析」、日本原子力学会誌 Vol. 60, No.4 (2018) 43-47.

-受賞-

  1. 池田裕樹、嶋田雄介、吉田健太、井上耕治、永井康介、今野豊彦：「透過電子顕微鏡内加熱ホルダーを用いたその場観察における試料中温度分布の影響」、日本金属学会第163回秋期講演大会、2018年9月19-21日（東北大学川内北キャンパス）（9/19）（第31回優秀ポスター賞受賞）

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- 2017 -

  1. T. Yoshiie, A. Kinomura, Y. Nagai: Nuclear Instruments and Methods in Physics Research B393 (2017) 97-100, “Reaction kinetic analysis of reactor surveillance data.”

  2. Y. Ohno, K. Inoue, K. Fujiwara, K. Kutsukake, M. Deura, I. Yonenaga, N. Ebisawa, Y. Shimizu, K. Inoue, Y. Nagai, H. Yoshida, S. Takeda, S. Tanaka, M. Kohyama: Appl. Phys. Lett. 110 (2017) 062105, “Impact of local atomic stress on oxygen segregation at tilt boundaries in silicon.”

  3. Y. Tu, H. Takamizawa, B. Han, Y. Shimizu, K. Inoue, T. Toyama, F. Yano, A. Nishida, Y. Nagai: Ultramicroscopy 173 (2017) 58-63, “Influence of laser power on atom probe tomographic analysis of boron distribution in silicon.”

  4. K. Yoshida, M. Shimodaira, T. Toyama,Y. Shimizu, K. Inoue, T. Yoshiie, K. J. Milan, R. Gerard, Y. Nagai: Microscopy 66 (2017) 120-130, “Weak-beam scanning transmission electron microscopy for quantitative dislocation density measurement in steels.”

  5. Y.Ono, Y. Funakawa, K. Okuda, K. Seto, N. Ebisawa, K. Inoue, Y, Nagai: ISIJ International 57,7（2017）1273-1281, “Roles of Solute C and Grain Boundary in Strain Aging Behaviour of Fine-grained Ultra-low Carbon Steel Sheets.”

  6. M. Celebrano, L. Ghirardini, M. Finazzi, Y. Shimizu, Y. Tu, K. Inoue, Y. Nagai, T. Shinada, Y. Chiba, A. Abdelghafar, M. Yano, T. Tanii, and E. Prati: Optics Letters Vol. 42, Issue 17 (2017) 3311-3314, “1.54μm photoluminescence from Er:Ox centers at extremely low concentration in silicon at 300 K.”

  7. Y. Tu, B. Han, Y. Shimizu, K. Inoue, Y. Fukui, M. Yano, T. Tanii, T. Shinada and Y. Nagai: Nanotechnology 28 (2017) 385301, “Atom probe tomographic assessment of the distribution of germanium atoms implanted in a silicon matrix through nano-apertures.”

  8. Y. Ohno, K. Inoue, K. Fujiwara, K. Kutsukake, M. Deura, I. Yonenaga, N. Ebisawa, Y. Shimizu, K. Inoue, Y. Nagai, H. Yoshida, S. Takeda, S. Tanaka, M. Kohyama: Microscopy 268 (2017) 230-238, “Nanoscopic analysis of oxygen segregation at tilt boundaries in silicon ingots using atom probe tomography combined with TEM and ab initio calculations.”

-受賞-

  1. Y. Tu, B. Han, Y. Shimizu, Y. Kunimune, Y. Shimada, M. Inoue, K. Inoue, S. Nagata, Y. Nagai: “Atom Probe Tomographic Study on Implanted Deuterium in Al2O3/HfxSi1-xO2/SiO2 Stacks,” 第64回応用物理学会春季学術講演会2017.3.14-17（パシフィコ横浜）（ポスター賞受賞）



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- 2016 -

  1. Y. Shimizu, H. Takamizawa, K. Inoue, F. Yano, S. Kudo, A. Nishida, T. Toyama, and Y. Nagai: Japanese Journal of Applied Physics, Vol. 55, No. 2, 026501 (2016). “Impact of carbon co-implantation on boron distribution and activation in silicon studied by atom probe tomography and spreading resistance measurements.”

  2. B. Han, Y. Shimizu, G. Seguini, E. Arduca, C. Castro, G. Ben Assayag, K. Inoue, Y. Nagai, S. Schamm-Chardon, and M. Perego: RSC Advances, Vol. 6, Issue 5, pp. 3617-3622 (2016). “Evolution of shape, size, and areal density of a single plane of Si nanocrystals embedded in SiO2 matrix studied by atom probe tomography.”

  3. M. Yamada, K. Sawano, M. Uematsu, Y. Shimizu, K. Inoue, Y. Nagai, and K. M. Itoh: Japanese Journal of Applied Physics, Vol. 55, No. 3, 031304 (2016), “Suppression of segregation of the phosphorus δ-doping layer in germanium by incorporation of carbon.”

  4. Y. Kunimune, Y. Shimada, Y. Sakurai, M. Inoue, A. Nishida, B. Han, Y. Tu, H. Takamizawa, Y. Shimizu, K. Inoue, F. Yano, Y. Nagai, T. Katayama, and T. Ide: AIP Advances, Vol. 6, Issue 4, 045121 (2016) (7 pages), “Quantitative analysis of hydrogen in SiO2/SiN/SiO2 stacks using atom probe tomography.”

  5. Y. Matsukawa, T. Takeuchi, Y. Kakubo, T. Suzudo, H. Watanabe, H. Abe, T. Toyama, Y. Nagai: Acta Mater. 116 (2016) 104-114, “The two-step nucleation of G-phase in ferrite.”

  6. H. Takamizawa, Y. Shimizu, K. Inoue, Y. Nozawa, T. Toyama, F. Yano, M. Inoue, A. Nishida, Y. Nagai: Applied Physics Express 9 (2016) 106601-1~4, “Predoping effects of boron and phosphorous on arsenic diffusion along grain boundaries in polycrystalline silicon investigated by atom probe tomography.”

  7. Y. Ohno, K. Kutsukake, M. Deura, I. Yonenaga, Y. Shimizu, N. Ebisawa, K. Inoue, Y. Nagai, H. Yoshida, S. Takeda: Appl. Phys. Lett. 109 (2016) 142105-1~4, “Recombination activity of nickel, copper, and oxygen atoms segregating at grain boundaries in mono-like silicon crystals.”

  8. B. Han, Y. Shimizu, J. Wipakorn, K. Nishibe, Y. Tu, K. Inoue, N. Fukata, Y. Nagai: Nanoscale 8 (2016) 19811-1-5, “Boron distributions in individual core-shell Ge/Si and Si/Ge heterostructured nanowires.”

  9. Y. Matsukawa, HL. Yang, K. Saito, Y. Murakami, T. Maruyama, T. Iwai. K. Murakami, Y. Shinohara, T. Kido, T. Toyama, Z. Zhao, Y. Li, S. Kano, Y. Sato, Y. Nagai, H. Abe: Acta Materialia 102 (2016) 323-332, “The effect of crystallographic mismatch on the obstacle strength of second phase precipitate particles in dispersion strengthening: bcc Nb particles and nanometric Nb clusters embedded in hcp Zr.”

-Proceedings-

  1. K. Shima, Y. Tu, B. Han, H. Takamizawa, H. Shimizu, Y. Shimizu, T. Momose, K. Inoue, Y. Nagai, Y. Shimogaki: Advanced Metallization Conference 2015, “Characterization and Process Development of CVD/ALD-based Cu(Mn)/Co(W) Interconnect System.”

-和文報告-

  1. 井上耕治、永井康介：「陽電子消滅同時計数ドップラー広がりによる元素分析法」、陽電子科学 6 (2016)21-28　（解説）

-受賞-

  1. Y. Shimizu, T. A. Bakhsh, A. Sadr, J. Espigares, J. Tagami, B. Han, Y. Tu, K. Yoshida, K. Inoue, and Y. Nagai: “Atom probe tomographic study of human tooth materials” International Conference on Atom Probe Tomography & Microscopy (APT&M) Gyeongju, South Korea, June 12–17, 2016 [P-B2-2, p. 282 in abstracts, Poster] (Presented on June 15) Best Poster Award


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- 2015 -

  1. J. Jiang, Y.C. Wu,　X.B. Liu, R.S. Wang, Y. Nagai, K. Inoue, Y. Shimizu, T. Toyama: J. Nucl. Mater. 458 (2015) 326-334, “Microstructural evolution of RPV steels under proton and ion irradiation studied by positron annihilation spectroscopy

  2. T. Suzudo, Y. Nagai, D. Schwenc, A. Caro: Acta Mater. 89 (2015) 116-122, “Hardening in thermally-aged Fe-Cr binary alloys: Statistical parameters of atomistic configuration.

  3. T. Yoshiie, K. Sato, Q. Xu, Y. Nagai: Nuclear Instruments and Methods in Physics Research B 352(2015)125-129, “Reaction kinetic analysis of reactor surveillance data.”

  4. Y. Ohno, K. Inoue, K. Kutsukake, M. Deura, T. Ohsawa, I. Yonenaga, H. Yoshida, S. Takeda, R. Taniguchi, H. Otubo, S. R. Nishitani, N. Ebisawa, Y. Shimizu, H. Takamizawa, K. Inoue, Y. Nagai: Phys. Rev. B 91 (2015) 235315, “Nanoscopic mechanism of Cu precipitation at small-angle tilt boundaries in Si.”

  5. Y. Ohno, K. Inoue, K. Fujiwara, M. Deura, K. Kutsukake, I. Yonenaga, Y. Shimizu, K. Inoue, N. Ebisawa, Y. Nagai: Appl. Phys. Lett. 106 (2015) 251603, “Three-dimensional evaluation ofgettering ability for oxygen atoms at small-angle tilt boundaries in Czochralski-grown silicon crystals.

  6. B. Han, H. Takamizawa, Y. Shimizu, K. Inoue, Y. Nagai, F. Yano, Y. Kunimune, M. Inoue, A. Nishida: Appl. Phys. Lett. 107 (2015) 023506, “Phosphorus and boron diffusion paths in polycrystalline silicon gate of a trench-type three-dimensional metal-oxide-semiconductor field effect transistor investigated by atom probe tomography.”

  7. T. Toyama, Y. Matsukawa, K. Saito, Y. Satoh, H. Abe, Y. Shinohara, Y. Nagai: Scripta Materialia 108 (2015) 156-159, “Microstructural analysis of impurity segregation around b-Nb precipitates in Zr–Nb alloy using positron annihilation spectroscopy and atom probe　tomography.”

  8. M. Shimodaira, T. Toyama, F. Takahama, N. Ebisawa, Y. Nozawa, Y. Shimizu, K. Inoue, Y. Nagai: Materials Transactions 56 (2015) 1513-1516, “Diffusivity and Solubility of Cu in a Reactor Pressure Vessel Steel Studied by Atom Probe Tomography.”

  9. M. Kubota, H. Takamizawa, Y. Shimizu, Y. Nozawa, N. Ebisawa, T. Toyama, Y. Ishida, K. Yanagiuchi, K. Inoue, and Y. Nagai: Microscopy and Microanalysis 21 (2015) 1373-1378, “Elemental distributions in multilayer systems by laser-assisted atom probe tomography with various analysis directions.”

  10. K. Sato, Q. Xu, T. Yoshiie, T. Sano, H. Kawabe, Y. Nagai, K. Nagumo, K. Inoue, T. Toyama, N. Oshima, A. Kinomura, Y. Shirai: Nucl. Instrum. Methods Phys. Res. Sect. B-Beam Interact. Mater. Atoms 342 (2015) 104-107, “Development of a mono-energetic positron beam line at the Kyoto University Research Reactor.”

-和文報告-

  1. 外山健、永井康介：放射線と産業139号（2015）4-8、特集「陽電子を用いた原子炉材料劣化機構の解明」


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- 2014 -

  1. Y. Shimizu,H. Takamizawa,K. Inoue, F. Yano, Y. Nagai, L. Lamagna, G. Mazzeo, M. Perego, E. Prati, Nanoscale 6 (2014) 706-710, “Behavior of phosphorous and contaminants from molecular doping combined with a conventional spike annealing method.”

  2. M. Kubota,Y. Ishida, K. Yanagiuchi,H.Takamizawa,Y. Nozawa, N. Ebisawa, Y. Shimizu, T. Toyama, K. Inoue, Y. Nagai: Journal of Surface Analysis 20 (2014) 207-210, “Depth Analysis of Ta/NiFe/Ta/CoFeB/Ta/NiFe Multilayer Thin Films: Comparison of Atom Probe Tomography and Auger Electron Spectroscopy.”

  3. Z. Tang, T. Chiba, Y. Nagai, K. Inoue, T. Toyama, and M. Hasegawa: Applied Physics Letters 104 (2014) 072101-1~5, “Positron annihilation study for enhanced nitrogen-vacancy center formation in diamond by electron irradiation at 77K.”

  4. T. Toyama, F. Takahama, A. Kuramoto, H. Takamizawa, Y. Nozawa, N. Ebisawa, M. Shimodaira, Y. Shimizu, K. Inoue, Y. Nagai: Scripta Materialia 83 (2014) 5-8, “The diffusivity and solubility of copper in ferromagnetic iron at lower temperatures studied by atom probe tomography.”

  5. T. Toyama, A. Kuramoto, Y. Nagai, K. Inoue, Y. Nozawa, Y. Shimizu, Y. Matsukawa, M. Hasegawa, M. Valo: J. Nucl. Mater., 449 (2014) 207-212, “Effects of post-irradiation annealing and re-irradiation on microstructure in surveillance test specimens of the Loviisa-1 reactor studied by atom probe tomography and positron annihilation.”

  6. K. Inoue, H. Kataoka, Y. Nagai, M. Hasegawa, Y. Kobayashi: J. Appl. Phys. 115 (2014) 204903, “Short and medium range order in two-component silica glasses by positron annihilation spectroscopy.”

  7. K. Shima, Y. Tu, H. Takamizawa, H. Shimizu, Y. Shimizu, T. Momose, K. Inoue, Y. Nagai, Y. Shimogaki: Applied Physics Letters 105 (2014) 133512-1~5, “Role of Wand Mn for reliable 1X nanometer-node ultra-large-scale integration Cu interconnects proved by atom probe tomography.”

-和文報告-

  1. 外山健、井上耕治、永井康介：機能材料34巻6号（2014）3-10、特集「構造材料の劣化機構解明へ向けた3次元アトムプローブの応用」

-Proceedings-

  1. Q Xu, K Sato, T Yoshiie, T Sano, H Kawabe, Y Nagai, K Nagumo, K Inoue, T Toyama, N Oshima, A Kinomura, Y Shirai: Journal of Physics: Conference Series(13th International Workshop on Slow Positron Beam Techniques and Applications) 505 (2014) 012030-1~5 , “Positron beam facility at Kyoto University Research Reactor.”

-受賞-

  1. 柳内克昭「複合解析技術を駆使したハードディスク用磁気ヘッド多層薄膜積層構造の原子レベルキャラクタリゼーション」、日本学術振興会マイクロビームアナリシス第141委員会　第20回2014年度榊技術賞　2014年9月11日


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- 2013 -

  1. A. Kuramoto, Y. Nagai, T. Toyama, T. Takeuchi, M. Hasegawa:　Mater. Sci. Forum 733 (2013) 257-263, “Positron annihilation study of neutron-irradiated nuclear reactor pressure vessel steels and their model alloy: Effect of purity on the post-irradiation annealing behavior.”

  2. Y. Shimizu, H. Takamizawa, Y. Kawamura, M. Uematsu, T. Toyama, K. Inoue, E. E. Haller, K. M. Itoh, Y. Nagai: J. Appl. Phys. 113 (2013) 026101, “Atomic-scale characterization of germanium isotopic multilayers by atom probe tomography.”

  3. K. Inoue, H. Takamizawa, Y. Shimizu, F. Yano, T. Toyama, A. Nishida, T. Mogami, K. Kitamoto, T. Miyagi, J. Kato, S. Akahori, N. Okada, M. Kato, H. Uchida, Y. Nagai: Applied Physics Express 6 (2013) 046502, “Three-Dimensional Dopant Characterization of Actual Metal-Oxide-Semiconductor Devices of 65nm Node by Atom Probe Tomography.”

  4. H. Takamizawa, K. Hoshi, Y.Shimizu, F. Yano, K. Inoue, S. Nagata, T. Shikama, Y. Nagai: Applied Physics Express 6(2013) 066602, “Three-Dimensional Characterization of Deuterium Implanted in Silicon Using Atom Probe Tomography.”

  5. A. Kuramoto, T. Toyama, Y. Nagai, K. Inoue, Y. Nozawa, M. Hasegawa, M. Valo: Acta Mater. 61(2013)5236-5246, “Microstructural changes in a Russian-type reactor weld material after neutron irradiation, post-irradiation annealing and re-irradiation studied by atom probe tomography and positron annihilation spectroscopy.”

  6. T. Takeuchi, Y. Kakubo, Y. Matsukawa, Y. Nozawa, Y. Nagai, Y. Nishiyama, J. Katsuyama, K. Onizawa, M. Suzuki: J. Nucl. Mater. 443 (2013) 266-273, “Effect of neutron irradiation on the microstructure of the stainless steel weld overlay cladding of nuclear reactor pressure vessels.”

  7. Y. Ohno, K. Inoue, Y. Tokumoto, K. Kutsukake, I. Yonenaga, N. Ebisawa, H. Takamizawa, Y. Shimizu, K. Inoue, Y. Nagai, H. Yoshida, S. Takeda: Appl. Phys. Lett. 103 (2013) 102102, “Three-dimensional evaluation of gettering ability of R3f111g grain boundaries in silicon by atom probe tomography combined with transmission electron microscopy.”

  8. K. Inoue, H. Kataoka, Y. Nagai, M. Hasegawa, Y. Kobayashi: J. Appl. Phys. 114 (2013) 154904, “Reaction of positronium with doped ions in silica-based glasses in the size determination of subnanometer structural open spaces.”

  9. T. Toyama, Y. Nagai, A. Al Mazouzi, M. Hatakeyama, M. Hasegawa, T. Ohkubo, E. Van Walle, R. Gerard: Mater. Trans. 54 (2013) 2119-2124, “Intergranular Segregation in the Pressure Vessel Steel of a Commercial Nuclear Reactor Studied by Atom Probe Tomography.”

-和文報告-

  1. 清水康雄、井上耕治、高見澤悠、矢野史子、永井康介：日本真空学会機関誌 真空（Journal of the Vacuum Society of Japan）第56巻 第9号 (2013) 340-347、”3次元アトムプローブによる半導体ナノ構造の元素分布解析.”

  2. 外山健, 蔵本明, M. Valo, 野沢康子, 清水康雄, 井上耕治, 長谷川雅幸, 永井康介： 陽電子科学 1 (2013) 41-46「陽電子消滅および3次元アトムプローブによる原子炉圧力容器鋼の照射脆化機構に関する研究－フィンランド・ロビーザ炉監視試験片を例として－」.

-書籍-

  1. 薄膜の評価技術ハンドブック　矢野史子 第III部　薄膜の応用事例とその性能評価法　第１章　LSI評価　第１節　LSI評価の概要

  2. 試料分析講座．半導体・電子材料分析（ISBN978-4-621-08700-8, 日本分析化学会編,丸善出版）第6章 三次元アトムプローブ, pp.71-92　井上耕治, 清水康雄, 永井康介

-その他-

  1. 永井康介：エネルギーと動力2013年春季号No.280 [談話室] 96～99「3次元アトムプローブによる原子レベルの不純物元素分布解析-原子炉材料から半導体デバイスまで-」

-受賞-

  1. 第125回金研講演会 ポスター賞、清水康雄、高見澤悠、河村踊子、植松真司、伊藤公平、Eugene E. Haller、井上耕治、外山健、永井康介、「アトムプローブ法によるゲルマニウム同位体超構造の3次元分布解析」、第125回金研講演会　2013年5月22日


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- 2012 -

  1. H. Takamizawa, Y. Shimizu, Y. Nozawa, T. Toyama, H. Morita, Y. Yabuuchi, M. Ogura, Y. Nagai: Applied Physics Letters 100 (2012) 093502-1-3, “Dopant characterization in self-regulatory plasma doped fin field-effect transistors by atom probe tomography.”

  2. J.B. Yang, Y.N. Osetsky, R.E. Stoller, Y. Nagai, M. Hasegawa: Scripta Materialia 66 (2012) 761-764 , “The effect of twist angle on anisotropic mobility of {110} hexagonal dislocation networks in α-iron.”

  3. T. Takeuchi, J. Kameda, Y. Nagai, T. Toyama, Y. Matsukawa, Y. Nishiyama, K. Onizawa: J. Nucl. Mater. 425 (2012) 60-64,” Microstructural changes of a thermally aged stainless steel submerged arc weld overlay cladding of nuclear reactor pressure vessels.”

  4. A. Kuramoto, T. Toyama, T. Takeuchi, Y. Nagai, M. Hasegawa, T. Yoshiie, Y. Nishiyama: J. Nucl. Mater. 425 (2012) 65-70, “Post-irradiation annealing behavior of microstructure and hardening of a reactor pressure vessel steel studied by positron annihilation and atom probe tomography.”

  5. T. Toyama, Y. Nozawa, W. Van Renterghem, Y. Matsukawa, M. Hatakeyama, Y. Nagai, A. Al Mazouzi, S. Van Dyck: J. Nucl. Mater. 425 (2012) 71-75, “Grain boundary segregation in neutron-irradiated 304 stainless steel studied by atom probe tomography.”

  6. H. Takamizawa, Y. Shimizu, K. Inoue, T. Toyama, F. Yano, A. Nishida, T. Mogami, N. Okada, M. Kato, H. Uchida, K. Kitamoto, T. Miyagi, J. Kato, Y. Nagai: Applied Physics Letters 100 (2012) 253504-1-3, “Correlation between threshold voltage and channel dopant concentration in negative-type metal-oxide-semiconductor field-effect transistors studied by atom probe tomography.”

  7. T. Toyama, Z. Tang, K. Inoue, T. Chiba, T. Ohkubo, K. Hono, Y. Nagai, M. Hasegawa: Phys. Rev. B 86 (2012) 104106-1-7, “Size estimation of embedded Cu nanoprecipitates in Fe by using affinitively trapped positrons.”

-和文報告-

  1. 井上耕治、清水康雄、高見澤悠：日本物理学会誌 「最近の研究から」 第67巻 第9号 645-649, “レーザー３次元アトムプローブによる半導体材料中のドーパント分布解析”.

-受賞-

  1. ICPA-16 ポスター賞、Hongxia Xu, T. Toyama, Y. Matukawa, A. Kuramoto, Y. Nagai, D. Egusa, E. Abe, “Mg-Zn-Y alloys with long-period stacking order structures studied by positron annihilation spectroscopy”, ICPA-16, Aug. 19-24, 2012,Bristol, UK

  2. LPSO2012 ポスター賞、Hongxia Xu, K. Inoue, Y. Nagai, T. Toyama, Y. Matsukawa, A. Kuramoto, D. Egusa, E. Abe, “Atom probe and positron annihilation study of the Mg-Zn-Y alloys with long period stacking ordered (LPSO) phases”, LPSO2012, Oct. 1-3, 2012, Sapporo

  3. 2012MRSポスター賞、Y. Shimizu, H. Takamizawa, Y. Kawamura, M. Uematsu, K. M. Itoh, E. E. Haller, T. Toyama, Y. Nagai: “Atom Probe Tomography of Germanium Isotopic Multilayer Structures”, 2012MRS Fall Meeting, Nov. 25-30, 2012, Boston, USA (11/26)

  4. Short Presentation Award、K. Inoue, H. Takamizawa, Y. Shimizu, T. Toyama, F. Yano, A. Nishida, T. Mogami, N. Okada, M. Kato, H. Uchida, K. Kitamoto, T. Miyagi, J. Kato, Y. Nagai: “Threshold Voltage and Channel Dopant Concentration Correlation in Silicone-Based Field-Effect Transistors Studies by Atom Probe Tomography” Summit of Materials Science 2012, Sendai, Nov. 2012


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- 2011 -

  1. H. Takamizawa, K. Inoue, Y. Shimizu, T. Toyama, F. Yano, T. Tsunomura, A. Nishida, T. Mogami, Y. Nagai: Applied Physics Express 4 (2011) 036601-1~3, “Channel Dopant Distribution in Metal-Oxide-Semiconductor Field-Effect Transistors Analyzed by Laser-Assisted Atom Probe Tomography.”

  2. Y. Nagai, K. Takadate, Z. Tang, H. Ohkubo, H. Sunaga, H. Takizawa and M. Hasegawa: J. Phys. Conf. Ser. 265 (2011) 012007, “Effect of electron- and neutron-irradiation on Fe-Cu model alloys studied by positron annihilation spectroscopy.”

  3. Y. Shimizu, Y. Kawamura, M. Uematsu, M. Tomita, T. Kinno, N. Okada, M. Kato, H. Uchida, M. Takahashi, H. Ito, H. Ishikawa, Y. Ohji, H. Takamizawa, Y. Nagai, and K. M. Itoh: J. Appl. Phys. 109 (2011) 036102, “Depth and lateral resolution of laser-assisted atom probe microscopy of silicon revealed by isotopic heterostructures.”

  4. K. Inoue, N. Suzuki, T. Hyodo, Y. Nagai, M. Hasegawa: J. Phys. Soc. Jpn. 80 (2011) 054709, “Delocalized Positronium in BaF2."

  5. K. Inoue, Y. Nagai, Z. Tang, T. Toyama, Y. Hosoda, A. Tsuto, and M. Hasegawa : Phys. Rev. B 83 (2011) 115459, “Time evolution of positron affinity trapping at embedded nanoparticles by age-momentum correlation.”

  6. Y. Shimizu, H. Takamizawa, K. Inoue, T. Toyama, Y. Nagai, N. Okada, M. Kato,　H. Uchida, F. Yano, T. Tsunomura, A. Nishida, and T. Mogami: App. Phys. Lett. 98 (2011) 232101-1~3, “Impact of carbon coimplantation on boron behavior in silicon: Carbon-boron coclustering and suppression of boron diffusion.”

  7. P. Pikart, C. Hugenschmidt, M. Horisberger, Y. Matsukawa, M. Hatakeyama, T. Toyama, Y. Nagai, Phys. Rev. B 84 (2011) 014106, “Positron annihilation in Cr, Cu, and Au layers embedded in Al and quantum confinement of positrons in Au clusters.”

  8. T. Toyama, Y. Nozawa, W. Van Renterghem, Y. Matsukawa, M. Hatakeyama, Y. Nagai, A. Al Mazouzi, S. Van Dyck: J. Nucl. Mater. 418 (2011) 62-68, “Irradiation-induced precipitates in a neutron irradiated 304 stainless steel studied by three-dimensional atom probe.”

  9. T. Takeuchi, J. Kameda, Y. Nagai, T. Toyama, Y. Nishiyama, K. Onizawa: J. Nucl. Mater. 415 (2011) 198-204, “Study on microstructural changes in thermally-aged stainless steel weld-overlay cladding of nuclear reactor pressure vessels by atom probe tomography.”

  10. H. Takamizawa, Y. Shimizu, K. Inoue, T. Toyama, N. Okada, M. Kato, H. Uchida, F. Yano, A. Nishida, T. Mogami,Y. Nagai: App. Phys. Lett. 99 (2011) 133502-1~3, “Origin of characteristic variability in metal-oxide-semiconductor field-effect transistors revealed by three-dimensional atom imaging.”

  11. K. Inoue, H. Takamizawa, K. Kitamoto, J. Kato, T. Miyagi, Y. Nakagawa, N. Kawasaki, N. Sugiyama, H. Hashimoto, Y. Shimizu, T. Toyama, Y. Nagai, A. Karen: Applied Physics Express 4 (2011) 116601-1~3, “Three-Dimensional Elemental Analysis of Commercial 45nm Node Device with High-k/Metal Gate Stack by Atom Probe Tomography.”

-受賞-

  1. TMS2011 ポスター賞、A. Kuramoto, T. Takeuchi, T. Toyama, Y. Nagai, M. Hasegawa, T. Yoshiie, Y. Nishiyama: “Effects of Irradiation Dose on Microstructural Evolution and Hardening of High- and Low-Cu Reactor Pressure Vessel Steels”, TMS annual Meeting & Exhibition 2011, Feb. 27- Mar. 3, San Diego

  2. 平成22年度MIRAI 賞最優秀賞（2011年3月29日）角村貴昭、竹内潔、稲葉聡、松平将治、蒲原史朗、矢野史子、西田彰男、アニル・クマール、水谷朋子、宋驍嵬、更屋拓哉、高見澤悠、清水康雄「大規模TEGを用いたばらつきメカニズム解明と低減化手法の開発」

  3. 第2回応用物理学会シリコンテクノロジー分科会論文賞（2011年3月）、K. Inoue, F.Yano, A.Nishida, H.Takamizawa, T.Tsunomura, Y.Nagai, M.Hasegawa, “Dopant distributions in n-MOSFET structure observed by atom probe tomography” Ultramicroscopy vol. 109, pp. 1479-1484 (2009).

  4. 所内講演（5/24-25）ポスター賞　高見澤・蔵本


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- 2010 -

  1. J.B. Yang, Y. Nagai, M. Hasegawa: Scripta Mater. 62 (2010) 458-461, “Use of the Frank-Bilby equation for calculating misfit dislocation arrays in interfaces.”

  2. J.B. Yang, Z.G. Yang, Y. Nagai, M. Hasegawa: Acta Mater. 58 (2010) 1599-1606, “A crystallographic model of fcc/bcc martensitic nucleation and growth.”

  3. Z. Tang, T. Rewcharoon, Y. Nagai, and M. Hasegawa: Acta Mater. 58 (2010) 1868-1875, “Positron annihilation studies of the interaction between oxygen impurities and nanovoids in neutron-irradiated vanadium.”

  4. J.B. Yang, Y. Nagai, M. Hasegawa and Yu.N. Osetsky: Phil. Mag. 90　No. 7-8 (2010) 991-1000, “Atomic scale modeling of {110} twist grain boundaries in α-iron:　Structure and energy properties.”

  5. T. Takeuchi, A. Kuramoto, J. Kameda, T. Toyama, Y. Nagai, M. Hasegawa, T. Ohkubo, T. Yoshiie, Y. Nishiyama and K. Onizawa:J. Nucl. Mater. 402 No. 2-3 (2010) 93-101, “Effects of chemical composition and dose on microstructure evolution and hardening of neutron irradiated reactor pressure vessel steels.”

  6. T. Toyama, N. Tsuchiya, Y. Nagai, A. Almazouzi, M. Hatakeyama, M. Hasegawa, T. Ohkubo, E. van Walle, R. Gerard: J. Nucl. Mater. 405 (2010) 177-180, “Irradiation-induced changes of the atomic distributions around the interfaces of carbides in a nuclear reactor pressure vessel steel.”

  7. K. Fujii, H. Nakata, K. Fukuya, T. Ohkubo, K. Hono, Y. Nagai, M. Hasegawa, T. Yoshiie: J. Nucl. Mater. 400 (2010) 46-55, “Hardening and microstructural evolution in A533B steels under neutron irradiation and a direct comparison with electron irradiation.”

-解説-

  1. 永井康介、高見澤悠、外山健、清水康雄、井上耕治、矢野史子、角村貴昭、西田彰男、最上徹：応用物理学会結晶工学分科会第15回結晶工学セミナーテキストp. 9-15、「3次元アトムプローブ：その原理と応用－MOSFET不純物分布解析を例に－」

-Proceedings-

  1. 清水康雄、高見澤悠、外山健、永井康介、井上耕治、矢野史子、角村貴昭、西田彰男、最上徹、岡田徳行、加藤幹雄、内田博：第30回LSIテスティングシンポジウム　pp. 305-309、「3DAP法による炭素を共注入したシリコン基板中ホウ素分布の解析」

-受賞-

  1. 日本物理学会若手奨励賞（2010年3月10日）「レーザー3次元アトムプローブによるMOS構造中ドーパントの不均一分布の解明」

  2. 平成21 年度MIRAI 賞優秀賞（平成22年3月24日）「アトムプローブを用いたSi-MOSFET の三次元不純物分布」、高見澤悠、永井康介、井上耕治、矢野史子、角村貴昭、西田彰男

  3. 日本鉄鋼協会俵論文賞（2010 年03 月28 日）「陽電子ドット閉じ込めを利用したFe中Cuナノ析出物の寸法評価法の開発」外山健、永井康介、唐政、井上耕治、千葉利信、長谷川雅幸、大久保忠勝、宝野和博


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- 2009 -

  1. M.J. Alingera, S.C. Glade, B.D. Wirth, G.R. Odette, T. Toyama, Y. Nagai, M. Hasegawa: Mat. Sci. Eng. A 518 (2009) 150-157, “Positron annihilation characterization of nanostructured ferritic alloys.”

  2. Y. Nagai, T. Toyama, Z.Tang, K.Inoue, T.Chiba, M.Hasegawa, S.Hirosawa and T.Sato: Phys. Rev. B 79 (2009) 201405(R), “Interactions between Fermi surfaces and Brillouin zone boundaries and phase stability of embedded metallic nanoparticles.”

  3. M. Hatakeyama, T. Toyama, J. Yang, Y. Nagai, M. Hasegawa, T. Ohkubo, M. Eldrup and B.N. Singh: J. Nucl. Mater.386-388 (2009) 852-855,“3D-AP and positron annihilation study of precipitation behavior in Cu-Cr-Zr alloy.”

  4. K. Inoue, F. Yano, A. Nishida, H. Takamizawa, T. Tsunomura, Y. Nagai, M. Hasegawa: Appl. Phys. Lett. 95 (2009, Jul) 043502-1~3,“Dopant distribution in gate electrode of n- and p-type metal-oxide-semiconductor field effect transistor by laser-assisted atom probe.”

  5. K. Inoue, F.Yano, A. Nishida, H. Takamizawa, T. Tsunomura, Y. Nagai, M. Hasegawa: Ultramicroscopy 109 (2009) 1479-1484, “Dopant distributions in n-MOSFET structure observed by atom probe tomography.”

  6. J.B. Yang, Y. Nagai, Z.G. Yang, M. Hasegawa: Acta Mater. 57 (2009) 4874-4881, “Quantization of the Frank-Bilby equation for misfit dislocation arrays in interfaces.”

  7. J. B. Yang, Z. G. Yang, Y. Nagai, M. Hasegawa: Phil. Mag. Lett. 89 (2009) 605-613, “Shape deformation by moving a glissile interface with one set of misfit dislocations.”

-和文報告-

  1. 外山健、永井康介、唐政、井上耕治、千葉利信、長谷川雅幸、大久保忠勝、宝野和博：鉄と鋼 Vol.95 No.2 (2009 Feb.) 118-123、 「陽電子量子ドット閉じ込めを利用したFe中Cuナノ析出物の寸法評価法の開発」

-Proceedings-

  1. 高見澤悠、井上耕治、矢野史子、西田彰男、永井康介、長谷川雅幸：第29回LSIテスティングシンポジウム　371-375、「3次元アトムプローブによるMOSトランジスタ中のドーパント分布解析」

-受賞-

  1. ICPA-15ポスター賞（2009年1月）”Annealing behavior of vacancy-type defects in electron-irradiated SixGe1-x bulk crystals at low temperature”, K. Inoue, T. Takeuchi, H. Takamizawa, Y. Nagai, Hasegawa, I. Yonenaga


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- 2008 -

  1. K. Ito, T. Oka, Y. Kobayashi, Y. Shirai, K. Wada, M. Matsumoto, M. Fujinami, T. Hirade, Y. Honda, H. Hosomi, Y. Nagai, K. Inoue, H. Saito, K. Sakaki, K. Sato, A. Shimazu, and A. Uedono: J. Appl. Phys. 104(2) (2008, July) 026102-1~3 , “Interlaboratory comparison of positron annihilation lifetime measurements for synthetic fused silica and polycarbonate.”

  2. K. Mondal, T. Ohkubo, T. Toyama, Y. Nagai, M. Hasegawa, K. Hono: Acta Mater. 56 (2008, Oct) 5329-5339, “The effect of nanocrystallization and free volume on the room temperature plasticity of Zr-based bulk metallic glasses.”

  3. Y. Nishiyama, K. Onizawa, M. Suzuki, J.W. Anderegg, Y. Nagai, T. Toyama, M. Hasegawa, J. Kameda: Acta Mater. 56 (2008, May) 4510-4521, “Effects of neutron-irradiation-induced intergranular phosphorus segregation and hardening on embrittlement in reactor pressure vessel steels.”

  4. K. Inoue, F. Yano, A. Nishida, T. Tsunomura, T. Toyama, Y. Nagai and M. Hasegawa: Appl. Phys. Lett. 93 (2008, Oct) 133507-1~3, “Three dimensional characterization of dopant distribution in polycrystalline silicon by atom probe microscopy.”

  5. Z. Tang, T. Toyama, Y. Nagai, K. Inoue, Z. Q. Zhu, and M. Hasegawa: J. Phys.: Condens. Matter 20 (2008, Sep) 445203-1~5, “Size-Dependent Momentum Smearing Effect of Positron Annihilation Radiation in Embedded Nano Cu Clusters.”

  6. K. Fukumoto, H. Matsui, H. Ohkubo, Z. Tang, Y. Nagai and M. Hasegawa: J. Nucl. Mater. 373 (2008) 289-294, “Identification of ultra-fine Ti-rich precipitates in V-Cr-Ti alloys irradiated below 300℃ by using positron CDB technique.”

  7. M. Hatakeyama, T. Toyama, Y. Nagai, M. Hasegawa, T. Ohokubo, M. Eldrup and B.N. Singh: Mater. Trans. 49 (2008) 518-521, “Nanostructural evolution of Cr-rich precipitates in a Cu-Cr-Zr alloy during heat treatment studied by 3 dimensional atom probe.”

  8. K. Inoue, F. Yano, A. Nishida, T. Tsunomura, T. Toyama, Y. Nagai, M. Hasegawa: App. Phys. Lett. 92 (2008) 103506-1~3, “Monolayer segregation of As atoms at the interface between gate-oxide and Si substrate in a metal-oxide-semiconductor field effect transistor by three-dimensional atom-probe technique.”

  9. C. Y. Lee, W. N. Kang, Y. Nagai, K. Inoue and M. Hasegawa: Journal of the Korean Vacuum Society Vol.17 No.2 (2008)160-164, “The Characterization of MgB2 Thin Film by Slow Positron Annihilation Spectroscopy.”

-和文報告-

  1. 木村晃彦、永井康介、藤井克彦、西山裕孝、曾根田直樹: 日本原子力学会誌 50 (10) (2008) 630-634、 「高度解析技術が原子力材料研究に与えたインパクト―最新技術がここまでわかってきた！（日本原子力学会　材料部会）」(解説).

  2. 外山健、土屋直柔、畠山賢彦、永井康介、長谷川雅幸、A.Almazouzi、E.van Walle、R.Gerard、大久保忠勝：まてりあ　47　(2008 Dec.) 610-610、 「原子炉圧力容器鋼中ナノ炭化物の三次元アトムプローブ観察」

-受賞-

  1. 永井康介：第3回日本物理学会若手奨励賞（平成20年10月）「埋め込みナノ粒子の陽電子捕獲とその応用」


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- 2007 -

  1. M. Hatakeyama, S. Tamura, T. Muroga, N. Yoshida, M. Hasegawa, H. Matsui: J. Nucl. Mater. 367-370 (2007) 882-886, “The diffusion behaviors of interstitial impurities in V-4Cr-4Ti alloys under ion irradiation.”

  2. T. Toyama, Y. Nagai, Z. Tang, M. Hasegawa, A. Almazouzi, E. vav Walle, R. Gerard: Acta Mater. 55 (2007) 6852-6860, “Nanostructural evolution in surveillance test specimens of commercial nuclear reactor pressure vessel studied br three dimensional atom prove and positron annihilation.”

  3. T. Chiba, T. Toyama, Y. Nagai, and M. Hasegawa: Phys. Stat. Sol. (c) 4, No.10, (2007) 3993-3996, “Resolution deconvolition method applied to 2D-ACAR measurements.”

-和文報告-

  1. 永井康介、外山健、長谷川雅幸: 金属 77 (2007) 1333 - 1338、「最新のナノ組織解析技術による脆化機構の解明　 －陽電子消滅法と３次元アトムプローブによる監視試験片の解析－」(解説)．

  2. 長谷川雅幸：金属 77 (2007) 1346 - 1349、「高経年化時代を迎えている原子炉圧力容器鋼の材料科学研究」 (解説)．

  3. 外山健、永井康介、長谷川雅幸、A. Almazouzi、E. van Walle、R. Gerard: まてりあ　46 (2007) 812,“原子炉圧力容器鋼中の亜粒界におけるP等の偏析の３Dアトムプローブ観察”．

-Proceedings-

  1. M. Hasegawa, Y. Nagai, T. Toyama, Y. Nishiyama, M. Suzuki, A. Alamazouzi, E. van Walle and R. Gerard: Proc. of the Int. Symp. on Research for Aging Management of Light Water Reactors, 　INSS, pp 18-1~18, (Oct, 22-23, 2007, Fukui City, JAPAN), “Evolution of Irradiation-Induced Cu Precipitation and Defects in Surveillance Test Specimens of Pressure Vessel Steels of Nuclear Power Reactors: Positron Annihilation and 3 Dimensional Atom Probe Study.”


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- 2006 -

  1. Y. Nagai, T. Toyama, Z. Tang, M. Hasegawa, H. Matsumoto, S. Hanada: Scripta Materialia 54 (2006) 1751-1753, “Quenched-in Vacancies in a beta Ti-Nb-Sb Alloy Studied by Positron Lifetime Spectroscopy.”

  2. T. Kuwabara, H. Kurishita, M. Hasegawa: Materials Science and Engineering A 417 (2006) 16-23, “Development of an ultra-fine grained V-1.7 mass% Y alloy dispersed with yttrium compounds having superior ductility and high strength.”

  3. H. Kurishita, T. Kuwabara, M. Hasegawa: Mat. Sci. Eng. A 432 (2006) 245-252, “Development of ultra-fine grained V-W-Y alloys with superior mechanical properties by effective usage of WC debris introduced during mechanical alloying.”

  4. H. Kurishita, T. Kuwabara, M. Hasegawa: Mat. Sci. Eng. A 433 (2006) 32-38, “Development of fine-grained V-28Cr-2.3Y and V-52Cr-1.8Y alloys with superior mechanical properties.”

  5. H. Kurishita, S. Kobayashi, K. Nakai, T. Kuwabara, M. Hasegawa: J. Nucl. Mater. 358 (2-3) (2006) 217-226, “Intrinsic martensite formation in neutron irradiated V-1.6%Y alloys with fine-grained structure of highly pure matrix.”

  6. M. Jardin, M. Lambrecht, A. Rempel, Y. Nagai, E. Van Walle, A. Almazouzi: Nucl. Instr. Mrth. Phys. Res. A568 (2006) 716-722, “Digital positron lifetime spectrometer for measurements of radioactive materials.”

  7. H. Shibamoto, A. Kimura, M. Hasegawa, H. Matsui, S. Yamaguchi: “Effect of Radiation on materials”, STP 1475 (ASTM International, West Conshohocken, PA, USA,2006): J. ASTM International 2 (2005) 274-281, “Effects of Proton Irradiation on Reactor Pressure Vessel Steel and Its Model Alloys.”

-和文報告-

  1. 永井康介、外山健、唐政、長谷川雅幸、大久保忠勝：材料とプロセス19（2006）584、「ナノ・サブナノCu析出物の寸法評価法の開発―陽電子量子ドット運動量スメアリング法―」.

-受賞-

  1. 外山健：The 14th International Conference on Positron Annihilation Poster Award, Jul. 2006


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- 2005 -

  1. M. Hasegawa, Z. Tang, Y. Nagai, T. Chiba, E. Kuramoto, M. Takaneka: Phil. Mag. 85 (2005) 467-478, “Irradiation Induced Vacancy and Cu Aggregations in Fe-Cu Model Alloys of Reactor Pressure Vessel Steels: State-of-the-Art Positron Annihilation Spectroscopy.”

  2. Z. Tang, Y. Nagai, K. Inoue T. Toyama, T. Chiba, M. Saito, M. Hasegawa: Phys. Rev. Lett. 94 (2005) 106402, “Self-energy correction to momentum-density distribution of a positron-electron pair.”

  3. Y. Nagai, T. Toyama, Y. Nishiyama, M. Suzuki, Z. Tang, M. Hasegawa: Appl. Phys. Lett. 87 (2005) 261920, “Kinetic of irradiation-induced Cu precipitation in nuclear reactor pressure vessel steels.”

  4. K. Fujii, K. Fukuya, N. Nakata, K. Hono, Y. Nagai, M. Hasegawa: J. Nucl. Mater.340 (2005) 247-258, “Hardening and microstructural evolution in A533B steels under high-dose electron irradiation.”

  5. H. Kurishita, T. Kuwabara, M. Hasegawa, S. Kobayashi, K. Nakai: J. Nucl. Mater. 343 (2005) 318-324, “Microstructural control to improve the resistance to radiation embrittlement in vanadium.”

  6. Y. Ishijima, H. Kurishita, H. Arakawa, M. Hasegawa, Y. Hiraoka, T. Takida, K. Takebe: Mater. Trans., 46 (2005) 568-574, “Microstructure and Bebd Ductulity of W-0.3 mass%TIC alloys Fabricated by Advanced Powder-Metallurgical Processing.”

  7. Y. Kitsunai, H. Kurishita, T. Kuwabara, M. Narui, M. Hasegawa, T. Takida K. Takebe: J. Nucl. Mater. 346 (2005) 233-243, “Radiation embrittlement behavior of fine-grained molybdenum alloy with 0.2wt.% TiC addition.”

-和文報告-

  1. 永井康介、長谷川雅幸：まてりあ（日本金属学会報）　第44巻　第8号　（2005）　667-673、 「陽電子をプローブとしたナノ・サブナノスケールの局所分析」（解説）

  2. 永井康介、長谷川雅幸：日本物理学会誌Vol.60、No.11（2005）842-849、 「自己探索プローブである陽電子による物質内部のナノ領域分析」（解説）


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- 2004 -

  1. T. Honma, S. Yanagita, K. Hono, Y. Nagai, M. Hasegawa: Acta Mater. 52 (2004) 1997-2003, “Coincidence Doppler broadening and 3DAP study of the pre-precipitation stage of an　Al-Li-Cu-Mg-Ag alloy.”

  2. Y. Nagai, T. Toyama, Z. Tang, M. Hasegawa, T. Ohkubo, K. Hono: Mater. Sci. Forum 445-446 (2004) 11-15, “Embedded Ultrafine Clusters Investigation by Coincidence Doppler Broadening Spectroscopy.”

  3. M. Eldrup, D.J. Edwards, B.N. Singh, Y. Nagai, H, Ohkubo, M. Hasegawa: Mater. Sci. Forum 445-446 (2004) 21-25, “Neutron irradiated copper: Is the main positron lifetime due to Stacking Fault Tetrahedra?”

  4. Manori P. Nadesalingam, S. Kim, N. G. Fazleev, J. L. Fry, Y. Nagai, M. Hasegawa, A. H. Weiss: Mater. Sci. Forum 445-446 (2004) 156-158, “Search for Positron Trapping at Quantum-Dot Like Cu Nano Particles on the Surface of Fe Using Positron Annihilation Induced Auger Electron Spectroscopy(PAES).

  5. H. Ohkubo, Y. Nagai, K. Inoue, Z. Tang, M. Hasegawa: Mater. Sci. Forum 445-446 (2004) 165-167, “Vacancy-Solute Binding Energies in Aluminum by Positron Annihilation.”

  6. T. Onitsuka, M. Takenaka, H. Abe, E. Kuramoto, H. Ohkubo, Y. Nagai, M. Hasegawa: Mater. Sci. Forum 445-446 (2004) 168-170, “Irradiation-Enhanced Cu-Precipitation in Fe-Cu Alloys Studied by Positron Annihilation Spectroscopy and Electrical Resistivity Measurement.”

  7. T. Toyama, Y, Nagai, Z. Tang, H. Hasegawa, T. Ohkubo, K. Hono: Mater. Sci. Forum 445-446 (2004) 195-197, “Irradiation-Induced Defects and Cu Precipitates in Ternary Fe-Based Model Alloys for Nuclear Reactor Pressure Vessel Steels Studied by Positron Annihilation and 3D Atom Probe.”

  8. K. Inoue, Y. Sasaki, Y. Nagai, H. Ohkubo, Z. Tang M. Hasegawa: Mater. Sci. Forum 445-446 (2004) 304-306, “Structural Subnanovoids in Silica-Based Glasses Probed by Positronium.”

  9. T. Chiba, Y. Nagai, Z. Tang, T. Akahane, M. Hasegawa, M. Takenaka, E. Kuramoto: Mater. Sci. Forum 445-446 (2004) 380-384, “Electronic Structure of Nanosized bcc Cu Precipitates in Fe-Cu Alloys Studied by Positron 2D-ACAR.”

  10. Z. Tang, M. Hasegawa, Y. Nagai, M. Saito: Mater. Sci. Forum 445-446 (2004) 390-394, “First-Principle Calculation of Positron Annihilation Characteristic in Solids: From Positron to Positronium.”

  11. Y. Ishijima, H. Kurishita, K. Yubuta, H. Arakawa, M. Hasegawa, Y. Hiraoka, T. Takida K. Takebe: J. Nucl. Mater. 329-333 (2004) 775-779, “Current status of ductile tungsten alloy development by mechanical alloying.”

-Proceedings-

  1. Y. Nagai, K. Takadate, Z. Tang, H. Ohkubo, M. Hasegawa: The Effect of Radiation on Materials: 21st International Symposium, ASTM STP 1447,　M. L. Grossbeck, T. R. Allen, R. G. Lott, and A. S. Kumar, Eds., ASTM International, West Conshohocken, PA, (2004) 590-602, “Irradiation Induced Vacancy-Cu Aggregations in Fe-Cu Model Alloys of Reactor Pressure Vessel Steels Studied by Positron Annihilation.”

  2. Y. Nagai, Z. Tang, M. Hasegawa: Proc. of 2nd Int. Conf. on Maltiscale Materials Modeling, (Oct. 11-15, 2004, Los Angels, USA), Ed. By N.M. Ghoniem, pp349-351, “Analysis of Embedded Nano-clusters by Positron Annihilation Spectroscopy.”

  3. T. Toyama, Y. Nagai, Y. Nishiyama, M. Suzuki, T. Ohkubo, K. Hono, M. Hasegawa: Proc. of 2nd Int. Conf. on Maltiscale Materials Modeling, (Oct. 11-15, 2004, Los Angels, USA), Ed. By N.M. Ghoniem, pp370-372, “Nano Cu Precipitation in Pressure Vessel Steel of Nuclear Power Reactor Studied by Positron Annihilation and 3D Atom Probe.”

  4. Y. Nagai, K. Hono, S. Yanagita, T. Honma M. Hasegawa: Proc. the 9th International Conference on Aluminum Alloys 2004, August 2-5, 2004, Brisbane Australia, edited by J. F. Nie, A. J. Morton, and B. C. Muddle, Institute of Materials Engineering Australia Ltd., “Coincidence Doppler broadening and 3DAP study of the pre-precipitation stage of Al(-Li)-Cu-Mg(-Ag) alloys.”

  5. T. Honma, K. Matsumoto, Y. Nagai, M. Hasegawa, K. Hono: Proc. the 9th International Conference on Aluminum Alloys 2004, August 2-5, 2004, Brisbane Australia, edited by J. F. Nie, A. J. Morton, and B. C. Muddle, Institute of Materials Engineering Australia Ltd., pp. 494 - 498, “Effect of reversion on the bake hardening response of Al-Mg-Si(-Cu) alloy.”


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- 2003 -

  1. Y. Nagai, K. Inoue, Z. Tang, I. Yonenaga, T. Chiba, M. Saito, M. Hasegawa: Physica B 340-342 (2003) 518-522, “Jahn-Teller distortion of neutral divacancy in Si studied by positron annihilation spectroscopy.”

  2. Y. Nagai, K. Takadate, Z. Tang, H. Ohkubo, H. Sunaga, H. Takizawa, M. Hasegawa : Phys. Rev. B 67 (2003) 224202-1～6, “Positron annihilation study of vacancy-solute complex evolution in Fe-based alloys.”

  3. Y. Nagai, Z. Tang, H. Ohkubo, K. Takadate, M. Hasegawa: Rad. Phys. Chem. 68 (2003) 381-386, “Elemental Analysis of Positron Affinitive Site in Materials by Coincidence Doppler Broadening Spectroscopy.”

  4. Y. Sasaki, Y. Nagai, H. Ohkubo, K. Inoue, Z. Tang, M. Hasegawa: Rad. Phys. Chem. 68 (2003) 569-572, “ Positronium in Silica-based Glasses.”

  5. H. Ohkubo, Z. Tang, Y. Nagai, M. Hasegawa, T. Tawara, M. Kiritani: Mater. Sci. Eng. A 350 (2003) 95-101, “Positron annihilation study of vacancy-type defects in high-speed deformed Ni, Cu and Fe.”

-和文報告-

  1. 永井康介、長谷川雅幸：「原子力材料とナノ銅クラスター」、新材料シリーズ“ナノメタルの最新技術と応用開発”、井上明久編集、シーエムシー出版 (2003) pp76-80　（書籍）

  2. 永井康介、長谷川雅幸、柳田誠也、宝野和博：「金属」Vol. 73、No.8　(2003)771-774、「圧力容器鋼モデル合金中の超微小Cu析出物の検出：陽電子消滅と3次元アトムプローブ」

  3. 永井康介、長谷川雅幸：日本分析化学会「ぶんせき」No.7（2003）374-381、「埋め込みナノ粒子の陽電子消滅法による解析」

-Proceedings-

  1. Y. Nagai, T. Toyama, Z. Tang, H. Ohkubo, K. Inoue, M. Hasegawa: Proc. of 11th Int. Conf. On “Environmental Degradation of Materials in Nuclear Power Systems - Water Reactors”, (August 10-14, 2003, Stevenson, Washington, USA), (ANS, La Grange Park, Illinois, USA, 2003) (CD-ROM) pp103-109, “Ultrafine Cu Precipitates in RPV Model Alloys Studied by Positron Annihilation and 3D Atom Probe.”

  2. K. Inoue, Y. Sasaki, Y. Nagai, H. Ohkubo, Z. Tang, M. Hasegawa: Proc. of International Workshop on Positron Studies of Defects in Semiconductors, Edited by M. Hasegawa, Z. Tang and Y. Nagai, Sept. 29-Oct. 4, 2002, Sendai, Japan, pp205-210, “Positronium in Silica-based Glasses.”

  3. Y. Nagai, K. Inoue, H. Ohkubo, Z. Tang, M. Hasegawa: Proc. of International Workshop on Positron Studies of Defects in Semiconductors, Edited by M. Hasegawa, Z. Tang and Y. Nagai, Sept. 29-Oct. 4, 2002, Sendai, Japan, pp245-250, “2D-ACAR Apparatus Installed in Tohoku University.”

  4. Y. Nagai, Z. Tang, K. Nakamura, K. Nakazuru, T. Nonaka, M. Hasegawa: Proc. of International Workshop on Positron Studies of Defects in Semiconductors, Edited by M. Hasegawa, Z. Tang and Y. Nagai, Sept. 29-Oct. 4, 2002, Sendai, Japan, pp162-171, “ Positron Trapping at Defects in Cz-Si at Low Temperatures.”

  5. T. Chiba, M. Hasegawa, Z. Tang, A. Kawasuso, T. Akahane, H. Sumiya, H. Itoh: Proc. of International Workshop on Positron Studies of Defects in Semiconductors, Edited by M. Hasegawa, Z. Tang and Y. Nagai, Sept. 29-Oct. 4, 2002, Sendai, Japan, pp172-179, “Positron 2D-ACAR Study on Defects in Semiconductors.”

  6. Z. Tang, Y. Nagai, K. Takadate, M. Hasegawa: Proceedings of the Seventh China-Japan Symposium, Materials for Advanced Energy Systems and Fission & Fusion Engineering, World Scientific, 2003, pp277-284, “Positron annihilation study for electronic structure of Cu precipitates in dilute Fe-Cu alloys.”


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- 2002 -

  1. Z. Tang, M. Hasegawa, Y. Nagai, M. Saito, Y. Kawazoe: Phys. Rev. B65 (4) (2002) 045108-1～10, “First-principles calculation of coincidence Doppler broadening of positron annihilation radiation.”

  2. Z. Tang, M. Hasegawa, Y. Nagai, M. Saito: Phys. Rev. B65 (2002) 195108-1～8, “Density functional study on metastable bcc copper: Electronic structure and momentum density of positron-electron pairs.”

  3. Y. Nagai, T. Honma, Z. Tang, K. Hono, M. Hasegawa: Phil. Mag. A82 (8) (2002) 1559-1572, “Coincidence Doppler Broadening Study of the Pre-precipitation Stage of an Al-Cu-Mg-Ag Alloy.”

  4. M. Hasegawa, Z. Tang, Y. Nagai, T. Nonaka, K. Nakamura: Appl. Surf. Sci. 194 (2002) 76-83, “Positron lifetime and coincidence Doppler broadening study of vacancy-oxygen complexes in Si: Experiments and first-principles calculations.”

  5. Y. Ishijima, K. Kakiuchi, T. Furuya, H. Kurishita, M. Hasegawa, T. Igarashi, M. Kawai: J. Nucl. Mater. 307-311 (2002) 1369-1374, “Corrosion resistance of refractory metals in high-temperature water.”

  6. K. Nogiwa, T. Yamamoto, K. Fukumoto, M. Matsui, Y. Nagai, K. Yubuta, M. Hasegawa: J. Nucl. Mater. 307-311 (2002) 946-950, “In situ TEM observation of dislocation movement through the ultrafine obstacles in an Fe alloy.”

-Proceedings-

  1. M. Hasegawa, Y. Nagai, Z. Tang, T. Kanai, T. Chiba, M. Takenaka, E. Kuramoto: Proc. of the 10th Int. Conf. on Environmental Degradation of Materials in Nuclear Power Systems- Water Reactors, Aug. 5-9, 2001, Lake Tahoe, Nevada, USA, NACE, 2002, (CD-ROM), “Positron Annihilation Characterization of Ultrafine Cu Precipitates and Vacancy Clusters Complexes in Thermally Aged and Neutron-Irradiated Fe-Cu Model Alloys.”

-受賞-


  1. 永井康介：第12回日本金属学会奨励賞（平成14年11月2日）


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- 2001 -

  1. T. Onitsuka, M. Takenaka, E. Kuramoto, Y. Nagai, M. Hasegawa: Phys. Rev. B 65 (2001) 012204, “Deformation-enhanced Cu precipitation in Fe-Cu alloy studied by positron annihilation spectroscopy.”

  2. Y. Nagai, T. Chiba, Z. Tang, T. Akahane, T. Kanai, M. Hasegawa, M. Takenaka, E. Kuramoto: Phys. Rev. Lett. 87 (2001) 176402, “Fermi Surface of Nano Crystalline Embedded Particles in Materials: bcc Cu in Fe.”

  3. Y. Nagai, Z. Tang, M. Hasegawa, T. Kanai, M. Saneyasu: Phys. Rev. B63 (2001) 134110, “Irradiation-induced Cu aggregations in Fe: An Origin of Embrittlement of Reactor Pressure Vessel Steels.”

  4. Y. Nagai, M. Murayama, Z. Tang, T. Nonaka, K. Hono, M. Hasegawa: Acta Mater. 49 (2001) 913-920, “Role of Vacancy-Solute Complex in the Initial Rapid Hardening in an Al-Cu-Mg Alloy.”

  5. C. L. Wang, Y. Kobayashi, W. Zheng, C. Zhang, Y. Nagai, M. Hasegawa: Phys. Rev. B63 (2001) 064204, “Positronium Formation in a Polymer Blend System Consisting of Polyethylene and Chlorinated Polyethylene.”

  6. W. Anwand, G. Brauer, M. Hasegawa, O. Dersch, F. Rach: Acta Phys. Polonica 99 (2001) 321-328, “A Study of Positron Properties in Quartz Crystals and Synthetic Silica Glass.”

  7. Z. Tang, T. Nonaka, Y. Nagai, M. Hasegawa: Mater. Sci. Forum 363-365 (2001) 67-69, “Identification of Vacancy-Oxygen Complexes in Si by Coincidence Doppler Broadening of Positron Annihilation Radiation and First-principles Calculations.”

  8. Y. Nagai, M. Hasegawa, Z. Tang, T. Kanai, M. Saneyasu: Mater. Sci. Forum 363-365 (2001) 91-93, “Study of Ultrafine Cu Precipitates in Neutron-Irradiated Fe Utilizing Positron Quantum-dot-like States.”

  9. M. Hasegawa, Z. Tang, Y. Nagai, T. Shimamura, K. Nakazuru, T. Chiba, M. Saito: Mater. Sci. Forum 363-365 (2001) 132-134, “Magic Number Vacancy Clusters in Graphite and Silicon.”

  10. T. Riewcharoon, Z. Tang, Y. Nagai, M. Hasegawa: Mater. Sci. Forum 363-365 (2001) 167-169, “Positron Annihilation Study of Microvoids in Neutron-Irradiated Vanadium: Effects of Oxygen Impurities.”

-和文報告-

  1. 永井康介、長谷川雅幸：金属 71(8) (2001) 742-748, “陽電子消滅法によるFe-Cuモデル合金中の微小Cu析出物の解析.

  2. 長谷川雅幸、八木栄一：金属 71(10) (2001) 962-967, “陽電子消滅法・イオンチャネリング法”.

-Proceedings-

  1. H. Shibamoto, T. Kitao, H. Matsui, M.Hasegawa, S. Yamaguchi, A. Kimura: Effects of Radiation on Materials: 20th International Symposium, ASTM STP 1405, S.T. Rosinski and M.L. Grossbeck, T.R. Allen and A.WS. Kumar, Eds., American Society for Testing and Materials, West Conshohocken, PA, USA, 2001, pp722-733, “Effects of Nickel on Irradiation Hardening and Microstructure Evolution of Proton Irradiated Fe-Cu Alloys.”

  2. Z. Tang, M. Hasegawa, T. Shimamura, Y. Nagai, K. Nakazuru, T. Chiba, M. Saito: Proc. of the 25th Conf.on Physics of Semiconductors, Osaka 2000 (Eds. N. Miura and T. Ando), (Springer, Berlin, 2001) pp1471-1472, “Magic vacancy clusters in graphite and Si: Positron annihilation study.”

-受賞-

  1. 永井康介：平成13年度（第2回）本間記念賞（平成13年5月21日）「鉄銅合金中の超微小銅析出物の形成と構造に関する研究」

  2. 永井康介：第41回原田研究奨励賞（平成13年11月2日）「新しい陽電子消滅法による原子炉圧力容器低合金鋼モデル合金中の照射誘起超微小銅析出物の形成・消滅過程の解明」


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- 2000 -

  1. Y. Nagai, M. Hasegawa, Z. Tang, A. Hempel, K. Yubuta, T. Shimamura, Y. Kawazoe, A. Kawai, F. Kano: Phys. Rev. B61 (2000) 6574-6578, “Positron Confinement in ultrafine embedded particles: Quantum-dot-like state in and Fe-Cu alloy.”

  2. M. Hasegawa, M. Saneyasu, M. Tabata, Z. Tang, Y. Nagai, T. Chiba, Y. Ito: Nucl. Instr. Meth. Phys. Res. B166-167 (2000) 431-439, “Positron and positronium studies of irradiation-induced defects and microvoids in vitreous and metamict silica.”

  3. Y. Nagai, Z. Tang, M. Hasegawa: Rad. Phys. Chem. 58 (2000) 737-742, “Chemical Analysis of Precipitates in Metallic Alloys Using Coincidence-Doppler Broadening of Positron Annihilation Radiation.”

  4. T. Kuwabara, H. Kurishita, M. Hasegawa: J. Nucl. Mater. 283-287 (2000) 611-614, “Microstructure control to improve mechanical properties of vanadium alloys for fusion applications.”


-Proceedings-

  1. Hempel, M. Saneyasu, Z. Tang, M.Hasegawa, G. Brauer, F. Plazaola, S. Yamaguchi, F. Kano, A. Kawai: Effects of Radiation on Materials: 19th International Symposium, ASTM STP-1366, M.L. Hamilton, A.S. Kumar, S.T. Rosinski and M.L. Grossbeck, Eds., American Society for Testing and Materials, West Conshohocken, PA, USA, 2000, pp560-578, “Effects of Neutron Irradiation on Fe-Cu Model Alloys and RPV Steels Probed by Positron Annihilation and Hardness Measurements.”


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- 1999 -

  1. N. Suzuki, Y. Nagai, T. Hyodo: Phys. Rev. B60 (1999) R9893-R9896, “Direct Observation of the Temperature Variation of the Short Positron Lifetime in Metals by Using the Positron Age-momentum Correlation Technique”.

  2. Y. Nagai, Y. Nagashima, T. Hyodo: Phys. Rev. B60 (1999) 7677-7679, “Lifetime of Delocalized positronium in α-SiO2”.

  3. K. Inoue, Y. Nagai, H. Saito, Y. Nagashima, T. Hyodo, S. Muramatsu, S. Nagai: Nucl. Instr. Meth. Phys. Res. A423 (1999) 364-368, “A position-sensitive scintillation detector for two-dimensional angular correlation of positron annihilation radiation using metal-package position-sensitive photomultiplier tubes”.

  4. H. Saito, Y. Nagai, T. Hyodo, K. Süvegh and A. Vertes: Japanese Journal of Applied Physics 37 (1998) 111-112, “Positron Annihilation in [Fe(ptz)6](BF4)2 and [Zn(ptz)6](BF4)2 Single Crystals Studied with One-Dimensional Angular Correlation of Annihilation Radiation”


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- 1998 -

  1. J. Yamaura, R. Kato, Y. Nagai, H. Saito, T. Hyodo: Phys. Rev. B58 (1998) 14098-14101, “X-ray diffraction study of [Zn(1-propyltetrazole)6](BF4)2 single crystal”.

  2. Y. Nagashima, Y. Morinaka, T. Kurihara, Y. Nagai, T. Hyodo, T. Shidara, K. Nakahara: Phys. Rev. B58 (1998) 12676-12679, “Origins of positronium emitted from SiO2”

  3. Y. Nagai, H. Saito, T. Hyodo, A. Vertes, K. Süvegh: Phys. Rev. B57 (1998) 14119-14122, “Local Structural Deformation in [Zn(ptz)6](BF4)2 and [Fe(ptz)6](BF4)2 Crystals Observed by Positron Annihilation Spectroscopy”.

  4. H. Saito, Y. Nagai, T. Hyodo, K. Süvegh and A. Vertes: Japanese Journal of Applied Physics 37 (1998) 111-112, “Positron Annihilation in [Fe(ptz)6](BF4)2 and [Zn(ptz)6](BF4)2 Single Crystals Studied with One-Dimensional Angular Correlation of Annihilation Radiation”


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- 1997 -

  1. T. Hyodo, Y. Nagai, H. Saito, Y. Nagashima, A. Vertes, K. Süvegh: Mater. Sci. Forum 255-257 (1997) 488-490, “Use of a Newly Developed Compact 2D-ACAR Spectrometer for the Study of Positronium in Solids”.

  2. Y. Nagai, H. Saito, Y. Nagashima, N. Kobayashi, T. Hyodo: Mater. Sci. Forum 255-257 (1997) 569-571, “Study of Delocalized Positronium in Alkali Halides by 2D-ACAR”.

  3. Y. Nagai, M. Kakimoto, H. Ikari, T. Hyodo: Mater. Sci. Forum 255-257 (1997) 596-598, “Analysis of Momentum Distribution of Bloch-Positronium in Solids”.

  4. Y. Nagai, H. Saito, T. Iwata, Y. Nagashima, T. Hyodo, H. Uchida, T. Omura: Mater. Sci. Forum 255-257 (1997) 781-783, “Development of Position Sensitive \gamma-ray Detectors for 2D-ACAR Apparatus”.

  5. Y. Nagai, H. Saito, Y. Nagashima, N. Kobayashi, T. Hyodo: J. Phys.: Condensed Matter 9 (1997) 11239-11246, “Two-dimensional 2\gamma Angular Correlation Study of Delocalized Positronium in Alkali Halides”.

  6. Y. Morinaka, Y. Nagashima, Y. Nagai, T. Hyodo, T. Kurihara, T. Shidara, K. Nakahara: Positron Annihilation 255-257 (1997) 689-691, “Time-of-Flight Spectroscopy of Positronium Emission from SiO2 Surface”


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- 1996 -

  1. Y. Nagai, H. Saito,T. Iwata, T. Hyodo, H. Uchida, T. Omura: Nucl. Instr. Meth. Phys. Res. A378 (1996) 629-632, “A new two-dimensional angular correlation of annihilation radiation apparatus using position-sensitive photomultiplier tubes”


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- 1995 -

  1. H. Saito, Y. Nagai, T. Hyodo, K. Süvegh, A. Vertes: Mater. Sci. Forum 175-178 (1995) 766-768, “The Effect of the Spin-Crossover on the ACAR Spectra through the Ortho-Para Conversion of Positronium”.

  2. S. Hasegawa, Y. Nagai, T. Oonishi, N. Kobayashi, T. Miyake ,S. Murakami, Y. Iishii, D. Hanawa, S. Ino: Phase Transition 53 (1995) 87-114, “Structural phase transitions at clean and metal-covered Si(111) surfaces investigated by RHEED spot analysis”.

  3. Y. Nagai, H. Saito, T. Hyodo, H. Uchida, T. Omura: Mater. Sci. Forum 175-178 (1995) 971-974, “Position Sensitive Scintillation Detectors forγ-rays”.


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- 1994 -

  1. Y. Nagai and T. Hyodo: Nucl. Instr. Meth. Phys. Res. A349 (1994) 285-288, “Position sensitive scintillation detectors for γ-rays using a GSO crystal”.


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- 1993 -

  1. S. Hasegawa, Y. Nagai, T. Oonish, S. Ino: Phys. Rev. B47 (1993) 9903-9906, “Hysteresis in phase transition at clean and Au-covered Si(111) surfaces”.


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