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NSR database version of May 24, 2024.

Search: Author = K.Takada

Found 26 matches.

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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 148,150,152,154Sm; 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 148,150,152,154Sm; 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 148,150,152,154Sm; 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 112,114,116,118,120,122Sn; 73,77,79,81Se; calculated levels. 72Se, 91Nb, 111,113,115,117,119,121Sn; 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 100,102,104,106,108Ru, 101,103,105,107,109Rh; 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 146,148,150,152,154Sm; 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 72,74,76,78,80Se, 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, 72,74,76,78,80Se, 78,80,82,84Kr, 78,80,82,84,86,92,94Sr, 94,96Zr, 92,96,98,100,102Mo, 96,98,100,102,104,106Ru; calculated E0 transition matrix elements, 0+ level energies, pairing-vibrational component. 104,106,108,110,112Pd, 106,108,110,112,114,116,118Cd, 112,114,116,118,120,122Sn; 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 112,114,116,118,120Sn, 106,108,110,112,114,116,118Cd; 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 111,113,115,117,119,121Sn; 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 72,74,76,78,80Se; 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, 72,74,76,78,80Se, 84Kr, 86Sr, 88Zr, 90Mo, 114,116,118,120,122,124,126Te; 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


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