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NSR database version of April 27, 2024.

Search: Author = K.Takada

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2006TA18      Prog.Theor.Phys.(Kyoto) 116, 107 (2006)

K.Takada, S.Tazaki, S.Yasumoto

Dyson Boson Mapping and Shell-Model Calculations for Even-Even Nuclei

NUCLEAR STRUCTURE ²²Ne, ²⁴Mg, ^46,48Ti, ⁵²Cr; calculated levels, J, π, B(E2); deduced coupling effects between collective and non-collective degrees of freedom. Shell model, Dyson boson mapping, comparison with data.

doi: 10.1143/PTP.116.107
Citations: PlumX Metrics

2004JE13      Nucl.Phys. A746, 293c (2004)

S.C.Jeong, I.Katayama, H.Kawakami, H.Ishiyama, Y.Watanabe, H.Miyatake, E.Tojyo, M.Oyaizu, K.Enomoto, M.Sataka, S.Okayasu, H.Sugai, S.Ichikawa, K.Nishio, Y.Sugiyama, A.Iwase, M.Yahagi, T.Hashimoto, K.Takada, M.Watanabe, M.Tanigaki, T.Shinozuka

⁸Li and ¹⁸F diffusion experiments in solids - an application of accelerated RNB -

doi: 10.1016/j.nuclphysa.2004.09.026
Citations: PlumX Metrics

2002TA12      Nucl.Phys. A706, 365 (2002)

K.Takada, S.Yasumoto

What is the Collective Subspace in the Many-Nucleon Hilbert Space ?

NUCLEAR STRUCTURE ^46,48,50Ca; calculated levels, J, π. Dyson boson mapping method, comparison with shell model results and data.

doi: 10.1016/S0375-9474(02)00880-1
Citations: PlumX Metrics

2001TA20      Prog.Theor.Phys.(Kyoto), Suppl. 141, 179 (2001)

K.Takada

Non-Unitary Boson Mapping and Its Application to Nuclear Collective Motions

doi: 10.1143/PTPS.141.179
Citations: PlumX Metrics

2000TA28      Prog.Theor.Phys.(Kyoto) 104, 173 (2000)

K.Takada, M.Sato, S.Yasumoto

A New Formulation of a Many-Level Shell Model - A Method of Constructing Orthonormal Basis States Analytically -

doi: 10.1143/PTP.104.173
Citations: PlumX Metrics

1998SA63      Prog.Theor.Phys.(Kyoto) 100, 581 (1998)

M.Sato, K.Takada

Convergence of Boson Expansion Theory

NUCLEAR STRUCTURE ²⁰⁸Pb; calculated excited levels vs octupole-force strength. Normal-ordered Holstein-Primakoff boson expansion.

doi: 10.1143/PTP.100.581
Citations: PlumX Metrics

1996TA14      Prog.Theor.Phys.(Kyoto) 95, 1121 (1996)

K.Takada, Y.R.Shimizu

Two-Octupole-Phonon States in ^146,148Gd

NUCLEAR STRUCTURE ^146,148Gd; calculated levels, B(λ); deduced Dyson boson mapping method applicability to two-octupole-phonon states.

doi: 10.1143/PTP.95.1121
Citations: PlumX Metrics

1991TA04      Nucl.Phys. A523, 354 (1991)

K.Takada, Y.R.Shimizu

Two-Octupole-Phonon States in ²⁰⁸Pb

NUCLEAR STRUCTURE ²⁰⁸Pb; calculated levels, B(λ). Collective multi-phonon space, Dyson boson mapping.

doi: 10.1016/0375-9474(91)90008-T
Citations: PlumX Metrics

1989TA13      Nucl.Phys. A496, 224 (1989)

K.Takada, K.Yamada, H.Tsukuma

Microscopic Study on the Shape Phase Transition in the Sm Isotopes (I). Effect of Ground-State Correlation

NUCLEAR STRUCTURE ^{148,150,152,154}Sm; calculated levels. Dyson boson mapping methods.

doi: 10.1016/0375-9474(89)90173-5
Citations: PlumX Metrics

1989YA05      Nucl.Phys. A496, 239 (1989)

K.Yamada, K.Takada, H.Tsukuma

Microscopic Study on the Shape Phase Transition in the Sm Isotopes: (II). Contribution from Non-Collective Degrees of Freedom

NUCLEAR STRUCTURE ^{148,150,152,154}Sm; calculated yrast levels. Dyson type self-consistent collective coordinate method.

doi: 10.1016/0375-9474(89)90174-7
Citations: PlumX Metrics

1989YA14      Nucl.Phys. A503, 53 (1989)

K.Yamada, K.Takada

Microscopic Study on the Shape Phase Transition in the Sm Isotopes (III). E2 Transition

NUCLEAR STRUCTURE ^{148,150,152,154}Sm; calculated B(λ); deduced shape phase transition. Microscopic approach.

doi: 10.1016/0375-9474(89)90253-4
Citations: PlumX Metrics

1988YA01      Nucl.Phys. A480, 143 (1988)

K.Yamada, K.Takada

Coupling Effect between Quadrupole Phonon and Pairing Vibration in Odd-Mass Nuclei

NUCLEAR STRUCTURE ^{112,114,116,118,120,122}Sn; ^73,77,79,81Se; calculated levels. ⁷²Se, ⁹¹Nb, ^{111,113,115,117,119,121}Sn; calculated levels, B(E2). Quadrupole phonon, pairing vibration coupling.

doi: 10.1016/0375-9474(88)90389-2
Citations: PlumX Metrics

1987TA02      Nucl.Phys. A462, 561 (1987)

K.Takada, K.Yamada

Application of Dyson Mapping to Odd-Mass Nuclei

NUCLEAR STRUCTURE ^{100,102,104,106,108}Ru, ^{101,103,105,107,109}Rh; calculated levels. Dyson theory.

doi: 10.1016/0375-9474(87)90405-2
Citations: PlumX Metrics

1987TS03      Nucl.Phys. A466, 70 (1987)

H.Tsukuma, H.Thorn, K.Takada

Application of the Dyson Boson Mapping to the Analysis of the Phase Transition at N = 88-90

NUCLEAR STRUCTURE ^{146,148,150,152,154}Sm; calculated neutron, proton gap energies, levels. Dyson boson mapping theory.

doi: 10.1016/0375-9474(87)90345-9
Citations: PlumX Metrics

1986TA04      Nucl.Phys. A448, 56 (1986)

K.Takada, S.Tazaki

Application of Dyson Boson Mapping to the Analysis of Mode-Mode Coupling in Ge and Se Isotopes

NUCLEAR STRUCTURE ^{72,74,76,78,80}Se, ^70,72,74,76Ge; calculated levels, B(λ), quadrupole moment. Dyson boson mapping, quadrupole phonon, pairing vibrational mode coupling.

doi: 10.1016/0375-9474(86)90180-6
Citations: PlumX Metrics

1985TA05      Nucl.Phys. A439, 489 (1985)

K.Takada

Dyson-Type Boson Mapping and SU(6) Boson Model

NUCLEAR STRUCTURE ⁷⁴Se, ¹¹⁴Cd, ¹²⁶Xe; calculated levels, yrast sequences, B(E2), ratios. Dyson type boson mapping, SU(6) model.

doi: 10.1016/0375-9474(85)90423-3
Citations: PlumX Metrics

1984TA21      Nucl.Phys. A431, 16 (1984)

K.Takada

Quasiparticle Shell-Model Calculation within Multi-Phonon Subspace and SU(6) Boson Model

NUCLEAR STRUCTURE ⁷⁴Se, ¹¹⁴Cd, ¹²⁶Xe; calculated yrast levels, B(E2). Quasiparticle shell model, multi-phonon subspace, SU(6) boson formalism.

doi: 10.1016/0375-9474(84)90053-8
Citations: PlumX Metrics

1983TA03      Nucl.Phys. A395, 165 (1983)

K.Takada, S.Tazaki

E0 Transition and Coupling between Quadrupole and Pairing-Vibrational Modes

NUCLEAR STRUCTURE ^66,68,70,72Zn, ^70,72,74,76Ge, ^{72,74,76,78,80}Se, ^78,80,82,84Kr, ^{78,80,82,84,86,92,94}Sr, ^94,96Zr, ^{92,96,98,100,102}Mo, ^{96,98,100,102,104,106}Ru; calculated E0 transition matrix elements, 0⁺ level energies, pairing-vibrational component. ^{104,106,108,110,112}Pd, ^{106,108,110,112,114,116,118}Cd, ^{112,114,116,118,120,122}Sn; calculated 2⁺ level energies, B(E2), quadrupole moment. Two-phonon, pairing vibration mode-mode coupling.

doi: 10.1016/0375-9474(83)90093-3
Citations: PlumX Metrics

1979TA26      Prog.Theor.Phys.(Kyoto) 61, 1666 (1979)

K.Takada, S.Tazaki

Quasiparticle-Shell-Model Calculations of So-Called Two-phonon States in Cd and Sn Isotopes

NUCLEAR STRUCTURE ^{112,114,116,118,120}Sn, ^{106,108,110,112,114,116,118}Cd; calculated levels, static quadrupole moment, B(E2); deduced anharmonicity effects. Quasiparticle shell model.

doi: 10.1143/PTP.61.1666
Citations: PlumX Metrics

1979TA27      Prog.Theor.Phys.(Kyoto) 62, 440 (1979)

K.Takada, S.Tazaki, K.Kaneko

Dynamical Anharmonicity Effects in Low-Lying Negative-Parity States of Odd-Mass Sn Isotopes

NUCLEAR STRUCTURE ^{111,113,115,117,119,121}Sn; calculated levels; deduced anharmonicity effects. Quasiparticle shell-model.

doi: 10.1143/PTP.62.440
Citations: PlumX Metrics

1978SA12      Z.Phys. A286, 195 (1978)

F.Sakata, S.Iwasaki, T.Marumori, K.Takada

Structure of Excited States in Se-Isotopes

NUCLEAR STRUCTURE ^{72,74,76,78,80}Se; calculated structure, B(E2).

doi: 10.1007/BF01408976
Citations: PlumX Metrics

1976IW04      Prog.Theor.Phys. 56, 1140 (1976)

S.Iwasaki, T.Marumori, F.Sakata, K.Takada

Structure of the Anomalous 0⁺' Excited States in Spherical Even-Even Nuclei with N or Z ≈ 40

NUCLEAR STRUCTURE ^70,72,74,76Ge, ^{72,74,76,78,80}Se, ⁸⁴Kr, ⁸⁶Sr, ⁸⁸Zr, ⁹⁰Mo, ^{114,116,118,120,122,124,126}Te; calculated structure of anomalous 0+ levels in spherical nuclei with N, Z ≈ 40, N=66.

doi: 10.1143/PTP.56.1140
Citations: PlumX Metrics

1974TA19      Progr.Theor.Phys. 52, 1205 (1974)

K.Takada, S.Tazaki

Role of Particle-Hole Interaction in the Four-Particle-Four-Hole States in ¹⁶O

NUCLEAR STRUCTURE ¹²C, ²⁰Ne; calculated levels.

doi: 10.1143/PTP.52.1205
Citations: PlumX Metrics

1972KA39      Prog.Theor.Phys. 47, 1537 (1972)

M.Kamimura, T.Matsuse, K.Takada

Alpha-Like Spatial Four-Body Correlations in Light Nuclei

NUCLEAR STRUCTURE ²⁰Ne; calculated levels; analyzed spatial correlations, higher-shell mixing effects. α-like spatial 4-body correlations.

doi: 10.1143/PTP.47.1537
Citations: PlumX Metrics

1972KA67      Progr.Theor.Phys.Suppl. 52, 282 (1972)

M.Kamimura, T.Marumori, K.Takada

Alpha-Like Four-Body Correlations and Molecular Aspects in Nuclei. Chapter VI. Many-Body Theoretical Description of Alpha-Like Four-Body Correlations

NUCLEAR STRUCTURE ¹⁹F, ^20,21Ne; calculated α-cluster structure.

doi: 10.1143/PTPS.52.282
Citations: PlumX Metrics

1962IK01      Progr.Theoret.Phys.(Kyoto) 27, 1077 (1962)

K.Ikeda, T.Marumori, K.Takada