1994 Fiscal Year Annual Research Report

極端状況下の原子核の構造と相互作用

Research Project

Project/Area Number	05243102
Research Institution	The University of Tokyo
Principal Investigator	石原正泰東京大学, 大学院・理学系研究科, 教授 (40013396)
Co-Investigator(Kenkyū-buntansha)	堀内昶京都大学, 理学部, 助教授 (60027349) 大塚孝治東京大学, 大学院・理学系研究科, 助教授 (20201379) 郷農靖之九州大学, 理学部, 助教授 (50016127) 谷畑勇夫理化学研究所, 主任研究員 (10089873) 福田共和東京大学, 原子核研究所, 助教授 (50116092)
Keywords	超重元素 / 中性子過剰核 / 高スピン核異性体 / 不安定核 / 反対称化分子動力学 / 分解反応 / 核機造 / 加速器技術
Research Abstract	「超重元素探索」:超重核合成のシミュレーションとして重イオンの融合断面積を系統的に調べ、中性子欠損の大きな領域では(HI,xn)反応に比べて(HI,pxn)反応や(HI,αxn)反応の方がはるかに優勢となることがわかった。また、^<166>Er(^<36>Ar,5n)反応により新同位体^<197>Rnを発見した。中性子過剰核の融合反応の研究では中性子ハロ-核^<11>Beと^<209>Biの融合反応断面積の測定に成功した。また、検出効率の高い大型のガス検出器の製作・テスト、読み出し回路の開発を行なった。「中性子過剰核」:中性子過剰核の弾性散乱と非弾性散乱の実験を進めた。^<11>Liの分解反応により、未知の同位体^<10>Heを発見した。相互作用断面積の測定によりNa同位体の半径を系統的に決定し、中性子スキンの存在の証拠をつかんだ。非束縛核^<13>Beの励起準位を、中性子移行反応を使って調べた。陽子との非弾性散乱の実験により^<12>Beの励起準位を調べ、He同位体2個のクラスター構造と思われる準位を2つ発見した。「高スピン原子核」:高スピン核異性体ビームによる2次反応の世界初の試みとして^<174>HfのK-核異性体のクーロン励起の実験を行ない、その観測に成功した。高スピン核異性体ビーム装置を利用して^<145>Smや^<148>Tbのレベルスキームの研究を行なった。また、セグメント型Ge検出器の性能をテストし、S/Nのよいスペクトルが得られることを実証した。「不安定核の理論」:東京大学・京都大学・新潟大学にワークステーションの配備を行なった。東京大学のグループでは、時間に依存するハートリーフォック計算やハートリーフォック法にRPA法を組み合わせた計算などにより、中性子スキンを持った中性子過剰核の性質を調べた。変形したポテンシャルにより^<11>Beが中性子ハロ-を持った超変形核であることを示し、光分解などの実験データを説明した。京都大学のグループは反対称化分子動力学により、BやCの同位体の研究を行なった。中性子過剰核では、クラスター構造が大きく成長するという傾向が得られた。新潟大学のグループは、確率論的変分法により多体クラスター構造を解き、例えば^6Heや^6Liの構造を研究した。時間依存するシュレ-ディンガー方程式により^<11>Beのクーロン分解反応機構を調べ、クーロン再加速などの研究を行なった。

Research Products
(77 results)

All Other

All Publications (77 results)

[Publications] T.Ichihara: "(^<12>C,^<12>N)Charge-Exchange Reaction at E/A=135 MeV" RIKEN Accelerator Progress Report(1993). 27. 41-41 (1994)
[Publications] K.Asahi: "Measurement of Quadrupole Moments for the Neutron-Rich Nuclei ^<14>B and ^<15>B" RIKEN Accelerator Progress Report(1993). 27. 42-42 (1994)
[Publications] N.Iwasa: "The Solar Neutrino Production Reaction ^7Be(p,γ)^8B Studied by the Coulomb Dissociation Method" RIKEN Accelerator Progress Report(1993). 27. 43-43 (1994)
[Publications] T.Nakamura: "Coulomb Dissociation of ^<11>Be" RIKEN Accelerator Progress Report(1993). 27. 47-47 (1994)
[Publications] T.Otsuka: "Neutron Halo Effect on Direct Neutron Capture and Photodisintegration" Physical Review. C49. R2289-R2292 (1994)
[Publications] T.Motobayashi: "Coulomb Dissociation of ^8B and ^7Be(p,γ)^8B Reaction at Low Energies" Physical Review Letters. 73. 2680-2683 (1994)
[Publications] H.Okuno: "Systematic Behavior of Ejectile Spin Polarization in the Projectile Fragmentation Reaction" Physics Letters. B335. 29-34 (1994)
[Publications] T.Ichihara: "Charge Exchange Reaction ^<12>C(^<12>C,^<12>N)^<12>B at E/A=135 MeV" Physics Letters. B323. 278-283 (1994)
[Publications] T.Motobayashi: "Large Deformation of Very Neutron-Rich Nucleus ^<32>Mg from Intermediate-Energy Coulomb Excitation" Physics Letters B (to be published). (1995)
[Publications] S.Shimoura: "Coulomb Dissociation Reaction and Correlations of Two Halo Neutrons in ^<11>Li" Physics Letters B (to be published). (1995)
[Publications] T.Nomura: "Study of α Decays Following ^<40>Ar Bombardment on ^<238>U" Proceedings of RIKEN International Workshop on Heavy-Ion Reactions with Neutron-Rich Beams. 269-277 (1994)
[Publications] T.Fukuda: "Heavy Ion Fusion with Neutron-Rich Beams" Proceedings of RIKEN International Workshop on Heavy-Ion Reactions with Neutron-Rich Beams. 264-268 (1994)
[Publications] T.Nomura: "Study of α Decays Following ^<40>Ar Bombardment on ^<238>U" RIKEN Accelerator Progress Report(1993). 27. 30-30 (1994)
[Publications] A.Yoshida: "Measurement of the Fusion Cross Section of ^<27>Al+^<197>Au using MWPC and Multi-target System" RIKEN Accelerator Progress Report(1993). 27. 114-114 (1994)
[Publications] T.Nomura: "Study of α Decays in the ^<40>Ar+^<232>Th Reaction Using the RIKEN Gas-Filled Separator I-General-" Proceedings of Tours Symposium on Nuclear Physics II,. (to be published). (1995)
[Publications] M.Kurokawa: "Study of α Decays in the ^<40>Ar+^<232>Th Reaction Using the RIKEN Gas-Filled Separator II-High Resolution Position-Sensitive Detector and Analysis-" Proceedings of Tours Symposium on Nuclear Physics II,. (to be published). (1995)
[Publications] M.Kurokawa: "Radiation Damage Factor for Ion-Implanted Silicon Detectors Irradiated with Heavy Ions" IEEE Transactions on Nuclear Science,. (to be published). (1995)
[Publications] A.Yoshida: "Measurement of Fusion Cross Section with Unstable Neutron-Rich Nuclei" Proceedings of International Workshop on Heavy-Ion Fusion. 311-318 (1994)
[Publications] A.Yoshida: "Measurement of Fusion Cross Section with Neutron Halo Nuclei" Nuclear Physics A. (to be published). (1994)
[Publications] H.Kitagawa: "Reaction Cross Sections of Light Isobars(A=17)in the Glauber Model" RIKEN Accelerator Progress Report(1993). 27. 9-9 (1994)
[Publications] D.Hirata: "Systematic Study of Sr Isotopes in the Relativistic Mean Field Theory" RIKEN Accelerator Progress Report(1993). 27. 20-20 (1994)
[Publications] D.Hirata: "Relativistic Mean Field Theory for the Isotope Shifts of Ba,Cs,and Xe" RIKEN Accelerator Progress Report(1993). 27. 21-21 (1994)
[Publications] S.Hirenzaki: "General Formula of the Coalescence Model" RIKEN Accelerator Progress Report(1993). 27. 24-24 (1994)
[Publications] K.Yoshida: "Coincidence Measurements for Neutrons and α Particles from the Fragmentation of ^6He at 800 A MeV" RIKEN Accelerator Progress Report(1993). 27. 34-34 (1994)
[Publications] A.Ozawa: "Interaction Cross Sections and Radii of Mass Number A=17 Isobars(^<17>N,^<17>F,and ^<17>Ne)" RIKEN Accelerator Progress Report(1993). 27. 44-44 (1994)
[Publications] A.Ozawa: "Beta-delayed Neutron Decay of ^<19>C" RIKEN Accelerator Progress Report(1993). 27. 45-45 (1994)
[Publications] J.Miller: "Mass Dependence of Pion Production in Heavy Ion Collisions Near but Below Threshold" RIKEN Accelerator Progress Report(1993). 27. 48-48 (1994)
[Publications] I.Tanihata: "Are All Dripline Nuclei Spherical?" RIKEN Accelerator Progress Report(1993). 27. 49-49 (1994)
[Publications] A.A.Korsheninnikov: "Experimental Study of the ^8He+p Elastic and Inelastic Scattering" RIKEN Accelerator Progress Report(1993). 27. 50-50 (1994)
[Publications] A.A.Korsheninnikov: "Observation of ^<10>He" RIKEN Accelerator Progress Report(1993). 27. 51-51 (1994)
[Publications] T.Suzuki: "Project at GSI "Determination of Neutron Skin Thickness for Na Isotopes"" RIKEN Accelerator Progress Report(1993). 27. 52-52 (1994)
[Publications] A.Korsheninnikov: "Observation of ^<10>He" Physics Letters. B326. 31-36 (1994)
[Publications] T.Nakamura: "Coulomb Dissociation of a Halo Nucleus ^<11>Be at 72 A MeV" Physics Letters. B331. 296-301 (1994)
[Publications] T.Morikawa: "Production of High-Spin Isomer Beam" RIKEN Accelerator Progress Report(1993). 27. 31-31 (1994)
[Publications] Y.Zhang: "High-Spin States of ^<144>Pm" RIKEN Accelerator Progress Report(1993). 27. 32-32 (1994)
[Publications] A.Odahara: "High-Spin States of ^<145>Sm" RIKEN Accelerator Progress Report(1993). 27. 33-33 (1994)
[Publications] A.Odahara: "High-Spin States of ^<145>Sm" Zeitschrift fur Physik. A350. 185-186 (1994)
[Publications] T.Morikawa: "Coulomb Excitation of ^<174>Hf K-Isomer-γ-Ray Spectroscopy with High-Spin Isomer Beam" Physics Letters B(to be published). (1995)
[Publications] T.Kishida: "The Decay of ^<14>Be" RIKEN Accelerator Progress Report(1993). 27. 46-46 (1994)
[Publications] N.Fukunishi: "Neutron-Skin and Proton-Skin Formations in Exotic Nuclei Far from Stability" RIKEN Accelerator Progress Report(1993). 27. 16-16 (1994)
[Publications] H.Nakada: "E2 Properties of Nuclei Far from Stability and the Proton-Halo Problem of ^8B" Physical Review. C49. 886-894 (1994)
[Publications] T.Suzuki: "Configuration of the Two-Neutron Halo of ^<11>Li and Gamov-Teller Transition" Physical Review. C50. R555-R558 (1994)
[Publications] Ka-Hae Kim: "Transfer and Fusion Reactions of Unstable Nuclei" Physical Review. C50. R566-R570 (1994)
[Publications] T.Otsuka: "Multiphonon Structure of γ-unstable or O(6) Nuclei" Physical Review. C50. R1768-R1770 (1994)
[Publications] A.Gelberg: "Pairing Multiplets in Nuclei with O(6) Dynamic Symmetry" Physical Review. C51. 147-151 (1995)
[Publications] N.Pietralla: "Distribution of Low-lying Quadrupole Phonon Strength in Nuclei" Physical Review Letters. 73. 2962-2965 (1994)
[Publications] I.Wiedenhoever: "Non-Yrast States in ^<125>Xe" Nuclear Physics. A582. 77-108 (1995)
[Publications] T.Otsuka: "M1 Excitation of Deformed Nuclei and Proton-Neutron Correlation" Nuclear Physics. A577. 197C-202C (1994)
[Publications] A.Gelberg: "F-Spin Multiplets and M1 Transitions" Nuclear Physics. A577. 207C-212C (1994)
[Publications] N.Pietralla: "Odd-Spin Yrast States as Multiple Quadrupole-Phonon Excitations" Physics Letters B. (to be published). (1995)
[Publications] T.Otsuka: "Structure of Nuclei Far from Stability" Nuclear Physics A. (to be published). (1995)
[Publications] Ka-Hea Kim: "Transfer and Fusion Reactions of Unstable Nuclei" Nuclear Physics A. (to be published). (1995)
[Publications] T.Otsuka: "Nuclear Mean Field on and near the Drip Lines" Physics Reports. (to be published). (1995)
[Publications] T.Otsuka: "Interacting Boson Model for O(6) Nuclei" Proc.of the Int.Conf.on Perspectives for the Interacting Boson Model on the Occasion of its 20th Anniversary. 33-44 (1994)
[Publications] T.Otsuka: "Neutron Halo Effect on Direct Neutron Capture and Photo Disintegration" Proceedings of the 8th International Symposium on Capture Gamma-ray Spectroscopy and Related Topics. 672-689 (1994)
[Publications] T.Mizuszki: "Microscopic Interacting Boson Model and its Application to Astrophysics" Proceedings of the 8th International Symposium on Capture Gamma-ray Spectroscopy and Related Topics. 748-755 (1994)
[Publications] G.Molnar: "Mixed-Symmetry States in O(6) Nuclei" Proc.of the Int.Conf.on Perspectives for the Interacting Boson Model on the Occasion of its 20th Anniversary. 87-94 (1994)
[Publications] M.Honma: "Superdeformation and IBM" Proc.of the Int.Conf.on Perspectives for the Interacting Boson Model on the Occasion of its 20th Anniversary. 343-350 (1994)
[Publications] T.Mizuszki: "IBM Approach to the Rotational Damping" Proc.of the Int.Conf.on Perspectives for the Interacting Boson Model on the Occasion of its 20th Anniversary. 417-420 (1994)
[Publications] A.Gelberg: "F-Spin Multiplets and M1 Transitions in the A=100 Mass Region" Proc.of the Int.Conf.on Perspectives for the Interacting Boson Model on the Occasion of its 20th Anniversary. 425-430 (1994)
[Publications] N.Yoshida: "IBFM Calculation of Xe and Cs Isotopes" Proc.of the Int.Conf.on Perspectives for the Interacting Boson Model on the Occasion of its 20th Anniversary. 453-456 (1994)
[Publications] K.Yamashita: "Calculation of Electromagnetic Properties by a (0+2)hω Shell Model" 素粒子論研究. (to be published). (1995)
[Publications] Ka-Hea Kim: "Transfer and Fusion Reactions of Unstable Nuclei" 素粒子論研究. (to be published). (1995)
[Publications] T.Otsuka: "Structure and Excitation of Nuclei Far from Stability" Proceedings of the Tours Symposium on Nuclear Physics II. (to be published). (1995)
[Publications] T.Otsuka: "Nuclear Structure Studies and Unstable Nuclei" Proceedings of the 3rd IN2P3-RIKEN Symposium on Heavy-Ion Collisions. (to be published). (1995)
[Publications] Y.Kanada-En'yo: "Clustering in Yrast States of ^<20>Ne Studied with Antisymmetrized Molecular Dynamics" Progress of Theoretical Physics. 93. 115-136 (1995)
[Publications] A.Ono: "Flow of Nucleons and Fragments in ^<40>Ar+^<27>Al Collisions Studied with AMD" Physical Review. C51. 299-309 (1995)
[Publications] H.Horiuchi: "Molecular Dynamics Model of Heavy Ion Collisions at Medium Energies" Nuclear Physics. A583. 297-304 (1995)
[Publications] H.Horiuchi: "Momentum Distribution of Clusters in Heavy Ion Collisions Studied with AMD" Proceedings of VI International Conference on Nuclear Reaction Mechanisms. 421-429 (1994)
[Publications] K.Varga: "Microscopic Multicluster Description of Neutron-Halo Nuclei with a Stochatic Variational Method" Nuclear Physics. A571. 447-466 (1994)
[Publications] Y.Ogawa: "Momentum Distributions of ^9Li Fragment Arising from(^<11>Li,^9Li)Reaction and Neutron Correlations" Nuclear Physics. A571. 784-802 (1994)
[Publications] K.Varga: "Microscopic Multicluster Description of Neutron-rich Helium Isotopes" Physical Review. C50. 189-195 (1994)
[Publications] T.Kido: "Coulomb Break-up Mechanism of Neutron Drip-Line Nuclei" Physical Review. C50. R1276-R1279 (1994)
[Publications] Y.Ohbayasi: "An Exploratory Study of ^<11>Li β Decay into ^9Li and Deuteron" Physics Letters B. (to be published). (1995)
[Publications] Y.Suzuki: "Study of Halo Structure in Light Nuclei with a Multicluster Model" Nuclear Physics A. (to be published). (1995)
[Publications] Y.Ogawa: "Transverse Momentum Distributions of a ^9Li Fragment in the (^<11>Li,^9Li)Reaction and Neutron Correlations" Nuclear Physics A. (to be published). (1995)
[Publications] K.Yabana: "One Dimensional Three-body Model for Low Energy Reactions of Halo Nuclei" Nuclear Physics A. (to be published). (1995)

1994 Fiscal Year Annual Research Report

極端状況下の原子核の構造と相互作用

Principal Investigator

石原 正泰 東京大学, 大学院・理学系研究科, 教授 (40013396)

Research Products

[Publications] T.Ichihara: "(^<12>C,^<12>N)Charge-Exchange Reaction at E/A=135 MeV" RIKEN Accelerator Progress Report(1993). 27. 41-41 (1994)

[Publications] K.Asahi: "Measurement of Quadrupole Moments for the Neutron-Rich Nuclei ^<14>B and ^<15>B" RIKEN Accelerator Progress Report(1993). 27. 42-42 (1994)

[Publications] N.Iwasa: "The Solar Neutrino Production Reaction ^7Be(p,γ)^8B Studied by the Coulomb Dissociation Method" RIKEN Accelerator Progress Report(1993). 27. 43-43 (1994)

[Publications] T.Nakamura: "Coulomb Dissociation of ^<11>Be" RIKEN Accelerator Progress Report(1993). 27. 47-47 (1994)

[Publications] T.Otsuka: "Neutron Halo Effect on Direct Neutron Capture and Photodisintegration" Physical Review. C49. R2289-R2292 (1994)

[Publications] T.Motobayashi: "Coulomb Dissociation of ^8B and ^7Be(p,γ)^8B Reaction at Low Energies" Physical Review Letters. 73. 2680-2683 (1994)

[Publications] H.Okuno: "Systematic Behavior of Ejectile Spin Polarization in the Projectile Fragmentation Reaction" Physics Letters. B335. 29-34 (1994)

[Publications] T.Ichihara: "Charge Exchange Reaction ^<12>C(^<12>C,^<12>N)^<12>B at E/A=135 MeV" Physics Letters. B323. 278-283 (1994)

[Publications] T.Motobayashi: "Large Deformation of Very Neutron-Rich Nucleus ^<32>Mg from Intermediate-Energy Coulomb Excitation" Physics Letters B (to be published). (1995)

[Publications] S.Shimoura: "Coulomb Dissociation Reaction and Correlations of Two Halo Neutrons in ^<11>Li" Physics Letters B (to be published). (1995)

[Publications] T.Nomura: "Study of α Decays Following ^<40>Ar Bombardment on ^<238>U" Proceedings of RIKEN International Workshop on Heavy-Ion Reactions with Neutron-Rich Beams. 269-277 (1994)

[Publications] T.Fukuda: "Heavy Ion Fusion with Neutron-Rich Beams" Proceedings of RIKEN International Workshop on Heavy-Ion Reactions with Neutron-Rich Beams. 264-268 (1994)

[Publications] T.Nomura: "Study of α Decays Following ^<40>Ar Bombardment on ^<238>U" RIKEN Accelerator Progress Report(1993). 27. 30-30 (1994)

[Publications] A.Yoshida: "Measurement of the Fusion Cross Section of ^<27>Al+^<197>Au using MWPC and Multi-target System" RIKEN Accelerator Progress Report(1993). 27. 114-114 (1994)

[Publications] T.Nomura: "Study of α Decays in the ^<40>Ar+^<232>Th Reaction Using the RIKEN Gas-Filled Separator I-General-" Proceedings of Tours Symposium on Nuclear Physics II,. (to be published). (1995)

[Publications] M.Kurokawa: "Study of α Decays in the ^<40>Ar+^<232>Th Reaction Using the RIKEN Gas-Filled Separator II-High Resolution Position-Sensitive Detector and Analysis-" Proceedings of Tours Symposium on Nuclear Physics II,. (to be published). (1995)

[Publications] M.Kurokawa: "Radiation Damage Factor for Ion-Implanted Silicon Detectors Irradiated with Heavy Ions" IEEE Transactions on Nuclear Science,. (to be published). (1995)

[Publications] A.Yoshida: "Measurement of Fusion Cross Section with Unstable Neutron-Rich Nuclei" Proceedings of International Workshop on Heavy-Ion Fusion. 311-318 (1994)

[Publications] A.Yoshida: "Measurement of Fusion Cross Section with Neutron Halo Nuclei" Nuclear Physics A. (to be published). (1994)

[Publications] H.Kitagawa: "Reaction Cross Sections of Light Isobars(A=17)in the Glauber Model" RIKEN Accelerator Progress Report(1993). 27. 9-9 (1994)

[Publications] D.Hirata: "Systematic Study of Sr Isotopes in the Relativistic Mean Field Theory" RIKEN Accelerator Progress Report(1993). 27. 20-20 (1994)

[Publications] D.Hirata: "Relativistic Mean Field Theory for the Isotope Shifts of Ba,Cs,and Xe" RIKEN Accelerator Progress Report(1993). 27. 21-21 (1994)

[Publications] S.Hirenzaki: "General Formula of the Coalescence Model" RIKEN Accelerator Progress Report(1993). 27. 24-24 (1994)

[Publications] K.Yoshida: "Coincidence Measurements for Neutrons and α Particles from the Fragmentation of ^6He at 800 A MeV" RIKEN Accelerator Progress Report(1993). 27. 34-34 (1994)

[Publications] A.Ozawa: "Interaction Cross Sections and Radii of Mass Number A=17 Isobars(^<17>N,^<17>F,and ^<17>Ne)" RIKEN Accelerator Progress Report(1993). 27. 44-44 (1994)

[Publications] A.Ozawa: "Beta-delayed Neutron Decay of ^<19>C" RIKEN Accelerator Progress Report(1993). 27. 45-45 (1994)

[Publications] J.Miller: "Mass Dependence of Pion Production in Heavy Ion Collisions Near but Below Threshold" RIKEN Accelerator Progress Report(1993). 27. 48-48 (1994)

[Publications] I.Tanihata: "Are All Dripline Nuclei Spherical?" RIKEN Accelerator Progress Report(1993). 27. 49-49 (1994)

[Publications] A.A.Korsheninnikov: "Experimental Study of the ^8He+p Elastic and Inelastic Scattering" RIKEN Accelerator Progress Report(1993). 27. 50-50 (1994)

[Publications] A.A.Korsheninnikov: "Observation of ^<10>He" RIKEN Accelerator Progress Report(1993). 27. 51-51 (1994)

[Publications] T.Suzuki: "Project at GSI "Determination of Neutron Skin Thickness for Na Isotopes"" RIKEN Accelerator Progress Report(1993). 27. 52-52 (1994)

[Publications] A.Korsheninnikov: "Observation of ^<10>He" Physics Letters. B326. 31-36 (1994)

[Publications] T.Nakamura: "Coulomb Dissociation of a Halo Nucleus ^<11>Be at 72 A MeV" Physics Letters. B331. 296-301 (1994)

[Publications] T.Morikawa: "Production of High-Spin Isomer Beam" RIKEN Accelerator Progress Report(1993). 27. 31-31 (1994)

[Publications] Y.Zhang: "High-Spin States of ^<144>Pm" RIKEN Accelerator Progress Report(1993). 27. 32-32 (1994)

[Publications] A.Odahara: "High-Spin States of ^<145>Sm" RIKEN Accelerator Progress Report(1993). 27. 33-33 (1994)

[Publications] A.Odahara: "High-Spin States of ^<145>Sm" Zeitschrift fur Physik. A350. 185-186 (1994)

[Publications] T.Morikawa: "Coulomb Excitation of ^<174>Hf K-Isomer-γ-Ray Spectroscopy with High-Spin Isomer Beam" Physics Letters B(to be published). (1995)

[Publications] T.Kishida: "The Decay of ^<14>Be" RIKEN Accelerator Progress Report(1993). 27. 46-46 (1994)

[Publications] N.Fukunishi: "Neutron-Skin and Proton-Skin Formations in Exotic Nuclei Far from Stability" RIKEN Accelerator Progress Report(1993). 27. 16-16 (1994)

[Publications] H.Nakada: "E2 Properties of Nuclei Far from Stability and the Proton-Halo Problem of ^8B" Physical Review. C49. 886-894 (1994)

[Publications] T.Suzuki: "Configuration of the Two-Neutron Halo of ^<11>Li and Gamov-Teller Transition" Physical Review. C50. R555-R558 (1994)

[Publications] Ka-Hae Kim: "Transfer and Fusion Reactions of Unstable Nuclei" Physical Review. C50. R566-R570 (1994)

[Publications] T.Otsuka: "Multiphonon Structure of γ-unstable or O(6) Nuclei" Physical Review. C50. R1768-R1770 (1994)

[Publications] A.Gelberg: "Pairing Multiplets in Nuclei with O(6) Dynamic Symmetry" Physical Review. C51. 147-151 (1995)

[Publications] N.Pietralla: "Distribution of Low-lying Quadrupole Phonon Strength in Nuclei" Physical Review Letters. 73. 2962-2965 (1994)

[Publications] I.Wiedenhoever: "Non-Yrast States in ^<125>Xe" Nuclear Physics. A582. 77-108 (1995)

[Publications] T.Otsuka: "M1 Excitation of Deformed Nuclei and Proton-Neutron Correlation" Nuclear Physics. A577. 197C-202C (1994)

[Publications] A.Gelberg: "F-Spin Multiplets and M1 Transitions" Nuclear Physics. A577. 207C-212C (1994)

[Publications] N.Pietralla: "Odd-Spin Yrast States as Multiple Quadrupole-Phonon Excitations" Physics Letters B. (to be published). (1995)

[Publications] T.Otsuka: "Structure of Nuclei Far from Stability" Nuclear Physics A. (to be published). (1995)

[Publications] Ka-Hea Kim: "Transfer and Fusion Reactions of Unstable Nuclei" Nuclear Physics A. (to be published). (1995)

[Publications] T.Otsuka: "Nuclear Mean Field on and near the Drip Lines" Physics Reports. (to be published). (1995)

[Publications] T.Otsuka: "Interacting Boson Model for O(6) Nuclei" Proc.of the Int.Conf.on Perspectives for the Interacting Boson Model on the Occasion of its 20th Anniversary. 33-44 (1994)

[Publications] T.Otsuka: "Neutron Halo Effect on Direct Neutron Capture and Photo Disintegration" Proceedings of the 8th International Symposium on Capture Gamma-ray Spectroscopy and Related Topics. 672-689 (1994)

[Publications] T.Mizuszki: "Microscopic Interacting Boson Model and its Application to Astrophysics" Proceedings of the 8th International Symposium on Capture Gamma-ray Spectroscopy and Related Topics. 748-755 (1994)

[Publications] G.Molnar: "Mixed-Symmetry States in O(6) Nuclei" Proc.of the Int.Conf.on Perspectives for the Interacting Boson Model on the Occasion of its 20th Anniversary. 87-94 (1994)

[Publications] M.Honma: "Superdeformation and IBM" Proc.of the Int.Conf.on Perspectives for the Interacting Boson Model on the Occasion of its 20th Anniversary. 343-350 (1994)

[Publications] T.Mizuszki: "IBM Approach to the Rotational Damping" Proc.of the Int.Conf.on Perspectives for the Interacting Boson Model on the Occasion of its 20th Anniversary. 417-420 (1994)

[Publications] A.Gelberg: "F-Spin Multiplets and M1 Transitions in the A=100 Mass Region" Proc.of the Int.Conf.on Perspectives for the Interacting Boson Model on the Occasion of its 20th Anniversary. 425-430 (1994)

[Publications] N.Yoshida: "IBFM Calculation of Xe and Cs Isotopes" Proc.of the Int.Conf.on Perspectives for the Interacting Boson Model on the Occasion of its 20th Anniversary. 453-456 (1994)

[Publications] K.Yamashita: "Calculation of Electromagnetic Properties by a (0+2)hω Shell Model" 素粒子論研究. (to be published). (1995)

[Publications] Ka-Hea Kim: "Transfer and Fusion Reactions of Unstable Nuclei" 素粒子論研究. (to be published). (1995)

[Publications] T.Otsuka: "Structure and Excitation of Nuclei Far from Stability" Proceedings of the Tours Symposium on Nuclear Physics II. (to be published). (1995)

[Publications] T.Otsuka: "Nuclear Structure Studies and Unstable Nuclei" Proceedings of the 3rd IN2P3-RIKEN Symposium on Heavy-Ion Collisions. (to be published). (1995)

[Publications] Y.Kanada-En'yo: "Clustering in Yrast States of ^<20>Ne Studied with Antisymmetrized Molecular Dynamics" Progress of Theoretical Physics. 93. 115-136 (1995)

[Publications] A.Ono: "Flow of Nucleons and Fragments in ^<40>Ar+^<27>Al Collisions Studied with AMD" Physical Review. C51. 299-309 (1995)

[Publications] H.Horiuchi: "Molecular Dynamics Model of Heavy Ion Collisions at Medium Energies" Nuclear Physics. A583. 297-304 (1995)

[Publications] H.Horiuchi: "Momentum Distribution of Clusters in Heavy Ion Collisions Studied with AMD" Proceedings of VI International Conference on Nuclear Reaction Mechanisms. 421-429 (1994)

[Publications] K.Varga: "Microscopic Multicluster Description of Neutron-Halo Nuclei with a Stochatic Variational Method" Nuclear Physics. A571. 447-466 (1994)

[Publications] Y.Ogawa: "Momentum Distributions of ^9Li Fragment Arising from(^<11>Li,^9Li)Reaction and Neutron Correlations" Nuclear Physics. A571. 784-802 (1994)

[Publications] K.Varga: "Microscopic Multicluster Description of Neutron-rich Helium Isotopes" Physical Review. C50. 189-195 (1994)

[Publications] T.Kido: "Coulomb Break-up Mechanism of Neutron Drip-Line Nuclei" Physical Review. C50. R1276-R1279 (1994)

[Publications] Y.Ohbayasi: "An Exploratory Study of ^<11>Li β Decay into ^9Li and Deuteron" Physics Letters B. (to be published). (1995)

[Publications] Y.Suzuki: "Study of Halo Structure in Light Nuclei with a Multicluster Model" Nuclear Physics A. (to be published). (1995)

石原正泰東京大学, 大学院・理学系研究科, 教授 (40013396)