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NSR database version of April 26, 2024.

Search: Author = S.Tazaki

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2019JI11      Phys.Rev. C 100, 064316 (2019)

H.Jin, S.Tazaki, K.Kaneko, H.-K.Wang, Y.Sun

High-spin states of the N=82 isotones ¹³⁶Xe, ¹³⁷Cs, and ¹³⁸Ba: Monopole-driven competition of neutron core excitations with two-proton excitations to the h_11/2 high-j orbit

NUCLEAR STRUCTURE ¹³⁶Xe, ¹³⁷Cs, ¹³⁸Ba; calculated high-spin levels, J, π, configurations, B(E2), effective single-particle energies (ESPEs), occupation numbers using large-scale shell-model calculations with the extended paring-plus-quadrupole interaction with monopole corrections (EPQQM); deduced a monopole-driven competition between different excitation modes in the high-lying, high-spin states in nuclei above ¹³²Sn, suggesting the importance of neutron core excitation for nuclei across the N=82 closed shell. Comparison with experimental data.

doi: 10.1103/PhysRevC.100.064316
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2019KA19      Nucl.Phys. A986, 107 (2019)

K.Kaneko, Y.Sun, T.Mizusaki, D.G.Jenkins, S.K.Ghorui, S.Tazaki

Large mirror asymmetry in Gamow-Teller β-decay in the A=26 isobaric multiplet

RADIOACTIVITY ²⁶Na, ²⁷Mg, ²⁸Al(β^-), ^26,27,28P(β⁺), (EC); compiled experimental mirror asymmetry δ from the ft data for mirror nuclei of A=17-35; deduced large mirror asymmetry between ²⁶P and ²⁶Na; calculated ft, mirror asymmetry in GT β-decay using large-scale shell model including Isospin-NonConserving (INC) forces with introduced T=1, J NOT= 0 INC forces deduced good agreement to the data, whereas usual J=0 INC force does not work. Calculations compared with available data.

doi: 10.1016/j.nuclphysa.2019.03.002
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2015KA46      Phys.Rev. C 92, 044331 (2015)

K.Kaneko, T.Mizusaki, Y.Sun, S.Tazaki

Systematical shell-model calculation in the pairing-plus-multipole Hamiltonian with a monopole interaction for the pf_5/2g_9/2 shell

NUCLEAR STRUCTURE ^{64,65,66,67,68,69,70,71,72,73,74,75,76}Ni, ^{64,65,66,67,68,69,70,71,72,73,74,75,76,77,78}Cu, ^{65,66,67,68,69,70,71,72,73,74,75,76,77,78,79,80}Zn, ^{66,67,68,69,70,71,72,73,74,75,76,77,78,79,80}Ga, ^{69,70,71,72,73,74,75,76,77,78,79,80}Ge, ^{67,68,69,70,71,72,73,74,75,76,77,78}As, ^{73,74,75,76,77,78,79,80}Se; calculated binding energies, effective single-particle energies of proton orbits for Cu isotopes, level energies of low-lying, low spin states and B(E2) values in even- and odd-A isotopes, neutron g_9/2 and proton p_3/2 occupancies for low lying states in Ge isotopes, magnetic moments and electric quadrupole moments of Cu, Ga, and Ge isotopes. ^{64,66,68,69,70,71,72,73,74,75,76}Ge, ^{68,69,70,71,72,73,74}Se; calculated low- and high-spin levels, J, π, B(E2). Shell-model calculations with a pairing-plus-multipole Hamiltonian and monopole-based universal force interaction (PMMU model) for the pf_5/2g_9/2 shell nuclei. Comparison with experimental and evaluated data.

doi: 10.1103/PhysRevC.92.044331
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2014KA03      Phys.Rev. C 89, 011302 (2014)

K.Kaneko, T.Mizusaki, Y.Sun, S.Tazaki

Toward a unified realistic shell-model Hamiltonian with the monopole-based universal force

NUCLEAR STRUCTURE Z=20-28, A=42-64; calculated binding energies and fitted with experimental values for 95 nuclides. ^{42,44,46,48,50,52,54,56,58}Ca, ^{44,46,48,50,52,54,56,58,60}Ti, ^{48,50,52,54,56,58,60,62}Cr, ^{52,54,56,58,60,62,64}Fe, ^{56,58,60,62,64,66,68,70,72,74}Ni, ^{60,62,64,66,68,70,72,74,76,78,80}Zn, ^{64,66,68,70,72,74,76,78,80,82}Ge, ^{68,70,72,74,76,78,80,82,84}Se; calculated energies and B(E2) for first 2+ levels. ⁵⁵Co, ⁵⁶Ni, ^69,72Ge; calculated levels, J, π. Unified realistic shell-model Hamiltonian employing pairing plus multipole Hamiltonian combined with monopole interaction (PMMU model). Comparison with experimental data.

doi: 10.1103/PhysRevC.89.011302
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2014KA08      Phys.Rev. C 89, 031302 (2014)

K.Kaneko, Y.Sun, T.Mizusaki, S.Tazaki

Isospin nonconserving interaction in the T=1 analogue states of the mass-70 region

NUCLEAR STRUCTURE A=66-78; calculated mirror energy differences (MEDs) and triplet energy differences (TEDs) for even-even nuclei in the T=1 analog states; calculated Coulomb energy differences for N=Z nuclei ⁶⁶As-⁶⁶Ge, ⁷⁰Br-⁷⁰Se, ⁷⁴Rb-⁷⁴Kr, and ⁷⁸Y-⁷⁸Sr. Large-scale shell-model calculations. Effect of isospin nonconserving (INC) nuclear force for the upper fp-shell region. Comparison with experimental data.

doi: 10.1103/PhysRevC.89.031302
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2013JI04      Phys.Rev. C 87, 044327 (2013)

H.Jin, Y.Sun, K.Kaneko, S.Tazaki

Shell model description with neutron g_9/2 excitation for neutron-rich ^57-62Mn isotopes

NUCLEAR STRUCTURE ^{57,58,59,60,61,62}Mn; calculated levels, J, π, bands, configurations, B(M1), B(E2), moments of inertia, neutron occupation numbers. Large-scale shell model calculations. Discussed neutron g_9/2 excitations. Comparison with experimental data.

doi: 10.1103/PhysRevC.87.044327
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2013KA15      Phys.Rev.Lett. 110, 172505 (2013)

K.Kaneko, Y.Sun, T.Mizusaki, S.Tazaki

Variation in Displacement Energies Due to Isospin-Nonconserving Forces

NUCLEAR STRUCTURE A=42-95; calculated Coulomb and triplet displacement energies, one- and two-proton separation energies; deduced importance of isospin-nonconserving forces. Large scale shell model calculation, GXPF1A and JUN45 effective interactions.

doi: 10.1103/PhysRevLett.110.172505
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2013WA27      Phys.Rev. C 88, 054310 (2013)

H.-K.Wang, Y.Sun, H.Jin, K.Kaneko, S.Tazaki

Structure analysis for hole-nuclei close to ¹³²Sn by a large-scale shell-model calculation

NUCLEAR STRUCTURE ¹³⁰Cd, ^130,131In, ^130,131Sn; calculated levels, J, π, configurations by large-scale shell-model calculations using computer code NUSHELLX. Comparison with experimental data taken from ENSDF database.

doi: 10.1103/PhysRevC.88.054310
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2012KA26      Phys.Rev.Lett. 109, 092504 (2012)

K.Kaneko, T.Mizusaki, Y.Sun, S.Tazaki, G.de Angelis

Coulomb Energy Difference as a Probe of Isospin-Symmetry Breaking in the Upper fp-Shell Nuclei

NUCLEAR STRUCTURE ⁶⁶As, ⁶⁶Ge, ⁷⁰Br, ⁷⁰Se, ⁷⁴Rb, ⁷⁴Kr, ⁷⁸Y, ⁷⁸Sr; calculated Coulomb energy differences; deduced isospin-symmetry breaking. Shell model calculations, Sakurai-Sugiura algorithm, comparison with available data.

doi: 10.1103/PhysRevLett.109.092504
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2012SU07      Phys.Rev. C 85, 054307 (2012)

Y.Sun, Y.-C.Yang, H.Jin, K.Kaneko, S.Tazaki

Projected shell model study for neutron-rich, odd-odd Mn isotopes

NUCLEAR STRUCTURE ^58,60,62Mn; calculated levels, J, π, bands, configurations, and moments of inertia with projected shell model and Nilsson model. Comparison with experimental data.

doi: 10.1103/PhysRevC.85.054307
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2011HA03      Phys.Lett. B 696, 197 (2011)

M.Hasegawa, Y.Sun, S.Tazaki, K.Kaneko, T.Mizusaki

Characteristics of the 2 1/2⁺ isomer in ⁹³Mo: Toward the possibility of enhanced nuclear isomer decay

NUCLEAR STRUCTURE ⁹³Mo, ⁹³Tc, ⁹⁵Ru; calculated excitation energy, structure of yrast states, B(E4), B(E2), B(M1). Microscopic shell model calculations, comparison with experimental data.

doi: 10.1016/j.physletb.2010.10.065
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2011JI10      Phys.Rev. C 84, 044324 (2011)

H.Jin, M.Hasegawa, S.Tazaki, K.Kaneko, Y.Sun

Large-scale shell-model calculation with core excitations for neutron-rich nuclei beyond ¹³²Sn

NUCLEAR STRUCTURE ^133,134Sn, ^133,134Sb, ^134,135Te, ¹³⁵I; calculated levels, J, π, B(E2), B(M1) values. Large scale shell-model calculations. Comparison with experimental data.

doi: 10.1103/PhysRevC.84.044324
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2011KA07      Acta Phys.Pol. B42, 439 (2011)

K.Kaneko, S.Tazaki, T.Mizusaki, Y.Sun, M.Hasegawa, G.de Angelis

Mirror Energy Difference at High Spins in the Mirror Pair ⁶⁷Se and ⁶⁷As

NUCLEAR STRUCTURE ⁶⁷Se, ⁶⁷As; calculated mirror energy difference for high-spin states. Comparison with all available data.

doi: 10.5506/APhysPolB.42.439
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2010KA32      Phys.Rev. C 82, 061301 (2010)

K.Kaneko, S.Tazaki, T.Mizusaki, Y.Sun, M.Hasegawa, G.de Angelis

Isospin symmetry breaking at high spins in the mirror pair ⁶⁷Se and ⁶⁷As

NUCLEAR STRUCTURE ⁶⁷Se, ⁶⁷As; calculated levels, J, π, mirror energy differences (MED), occupation numbers for proton and neutron orbits, spin distribution in each and spectroscopic quadrupole moments at high spins using large-scale shell-model approach. Comparison with experimental data.

doi: 10.1103/PhysRevC.82.061301
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2009ZH11      Phys.Rev. C 79, 044316 (2009)

Y.H.Zhang, M.Hasegawa, W.T.Guo, M.L.Liu, X.H.Zhou, G.de Angelis, T.M.Axiotis, A.Gadea, N.Marginean, Martinez, D.R.Napoli, C.Rusu, Zs.Podolyak, C.Ur, D.Bazzacco, F.Brandolini, S.Lunardi, S.M.Lenzi, R.Menegazzo, R.Schwengner, A.Gargano, W.von Oertzen, S.Tazaki

High-spin level structure in ^{94, 95}Mo

NUCLEAR REACTIONS ¹⁶O(⁸²Se, 4n), (⁸²Se, 3n), E=460 MeV; measured Eγ, Iγ, γγ-coin, angular distributions. ^94,95Mo; deduced levels, J, π, configurations. Comparisons with shell-model calculations. ⁹⁰Sr, ⁹²Mo; level systematics.

doi: 10.1103/PhysRevC.79.044316
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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
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2004HA15      Phys.Rev. C 69, 034324 (2004)

M.Hasegawa, K.Kaneko, T.Mizusaki, S.Tazaki

Different particle alignments in N ≈ Z Ru isotopes studied by the shell model

NUCLEAR STRUCTURE ^{88,89,90,91,92,93,94}Ru; calculated levels, J, π, B(E2), rotational bands features. Shell model, pairing-plus-quadrupole-quadrupole interaction. Comparison with data.

doi: 10.1103/PhysRevC.69.034324
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2002HA35      Prog.Theor.Phys.(Kyoto) 107, 731 (2002)

M.Hasegawa, K.Kaneko, S.Tazaki

Applicability of the Extended P + QQ Model in the Upper Part of the f_7/2 Shell

NUCLEAR STRUCTURE ⁴⁸Ca, ⁵²Cr, ^52,53Mn, ^52,53,54Fe, ⁵⁴Co, ⁵⁶Ni; calculated levels, J, π. ^51,52Mn, ⁵²Cr, ⁵³Fe; calculated μ, quadrupole moments, B(E2), B(M1). Extended pairing-plus-quadrupole model, comparison with data.

doi: 10.1143/PTP.107.731
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2001HA28      Nucl.Phys. A688, 765 (2001)

M.Hasegawa, K.Kaneko, S.Tazaki

Improvement of the Extended P + QQ Interaction by Modifying the Monopole Field

NUCLEAR STRUCTURE ⁴⁸Ca, ^47,50Ti, ⁴⁷V, ^49,51Cr, ^50,51Mn; calculated levels, J, quadrupole moments, B(E2). A=42-51; calculated ground-state energies. Extended pairing-plus-quadrupole interaction, comparisons with data.

doi: 10.1016/S0375-9474(00)00602-3
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2000HA32      Nucl.Phys. A674, 411 (2000); Erratum Nucl.Phys. A691, 791 (2001)

M.Hasegawa, K.Kaneko, S.Tazaki

Application of the Extended P + QQ Force Model to N ≈ Z fp Shell Nuclei

NUCLEAR STRUCTURE ⁴⁶Ti, ^46,48V, ^48,50Cr, ⁵⁰Mn; calculated levels, J, π, quadrupole moments, transitions B(E2). Extended pairing plus QQ force model, comparisons with data.

doi: 10.1016/S0375-9474(00)00171-8
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1998AN30      Phys.Rev. C58, 3286 (1998)

Y.Ando, S.Tazaki, M.Hasegawa

Odd-Even Differences in Moments of Inertia

doi: 10.1103/PhysRevC.58.3286
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1998HA23      Nucl.Phys. A633, 266 (1998)

M.Hasegawa, S.Tazaki

Alpha-Like Four-Nucleon Correlations in the Ground State of ⁴⁸Cr

NUCLEAR STRUCTURE ⁴⁸Cr; calculated ground-state energy. Multiple α-like cluster model, comparison with shell model. Systematics of ground-state properties in neighboring nuclei discussed.

doi: 10.1016/S0375-9474(98)00154-7
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1997HA35      Prog.Theor.Phys.(Kyoto) 97, 417 (1997); Erratum Prog.Theor.Phys.(Kyoto) 98, 1011 (1997)

M.Hasegawa, S.Tazaki, R.Okamoto

Instability of the HF Ground State in ⁵⁶Ni Caused by α-Like Four-Nucleon Correlations

NUCLEAR STRUCTURE ⁵⁶Ni; calculated ground-state stability conditions with respect to 4p-4h excitations; deduced instability. Hartree-Fock calculations.

doi: 10.1143/PTP.97.417
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1995HA21      Nucl.Phys. A592, 45 (1995)

M.Hasegawa, S.Tazaki, R.Okamoto

Condensed Structure of J = T = 0 α-Like Clusters in f_7/2-Shell Even-Even Nuclei with N = Z

NUCLEAR STRUCTURE ⁴⁴Ti, ⁴⁸Ca, ⁵²Fe, ⁵⁶Ni; calculated single particle levels approximate occupation probabilities; deduced α-like correlations related features. Microscopic approach.

doi: 10.1016/0375-9474(95)00296-D
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1993HA02      Phys.Rev. C47, 188 (1993)

M.Hasegawa, S.Tazaki

Calculation of the Moment of Inertia by a Proper Treatment of Pairing Correlations

NUCLEAR STRUCTURE ¹⁶⁰Dy; calculated nucleon gap parameter, levels, moment of inertia. Cranking model.

doi: 10.1103/PhysRevC.47.188
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1992HA11      Nucl.Phys. A539, 381 (1992)

M.Hasegawa, S.Tazaki

Algebraic Expression of the IBM3 Hamiltonian in Terms of Various Quantum Numbers (II). Numerical Test

NUCLEAR STRUCTURE ^44,46Ti, ⁴⁸Cr; calculated levels. Interacting boson model.

doi: 10.1016/0375-9474(92)90282-O
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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
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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
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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
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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
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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
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1971KU28      Progr.Theor.Phys. 46, 1420 (1971)

A.Kuriyama, M.Hasegawa, S.Tazaki, R.Okamoto

A Note on Pairing Vibrational Motion

doi: 10.1143/PTP.46.1420
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