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NSR database version of May 21, 2024.

Search: Author = M.Shimada

Found 9 matches.

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2018SH03      Phys.Rev. C 97, 024318 (2018)

M.Shimada, Y.Fujioka, S.Tagami, Y.R.Shimizu

Rotational motion of triaxially deformed nuclei studied by the microscopic angular-momentum-projection method. I. Nuclear wobbling motion

NUCLEAR STRUCTURE 162Yb; calculated levels, J, π, moment of inertia plots for the yrast and the first excited bands. 163Lu; calculated wobbling spectra, levels, J, π, triaxial superdeformed (TSD) bands, multiple wobbling rotational bands, B(E2), B(M1) and B(E2) ratios for transitions in TSD bands for different triaxial deformations, expectation values of the angular-momentum vectors, neutron and proton average pairing gaps, nuclear radius and various deformation parameters as functions of rotational frequency. Microscopic framework of angular-momentum projection from cranked triaxially deformed mean-field states, mainly using Woods-Saxon potential and the schematic separable interaction, and some results with the Gogny D1S interaction for description of wobbling motion. Comparison with experimental data.

doi: 10.1103/PhysRevC.97.024318
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2018SH04      Phys.Rev. C 97, 024319 (2018)

M.Shimada, Y.Fujioka, S.Tagami, Y.R.Shimizu

Rotational motion of triaxially deformed nuclei studied by the microscopic angular-momentum-projection method. II. Chiral doublet band

NUCLEAR STRUCTURE 128Cs, 104Rh; calculated levels, J, π, B(E2), chiral doublet bands, B(M1), B(M1)/B(E2) and B(M1) ratios for transitions in yrast and yrare bands, expectation values of the angular-momentum vectors; discussed chiral rotation in triaxially deformed nuclei. Microscopic framework of angular-momentum projection from cranked triaxially deformed mean-field states, using Woods-Saxon potential and the schematic separable interaction. Comparison with experimental data.

doi: 10.1103/PhysRevC.97.024319
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2016SH11      Phys.Rev. C 93, 044317 (2016)

M.Shimada, S.Tagami, Y.R.Shimizu

Realistic description of rotational bands in rare earth nuclei by the angular-momentum-projected multicranked configuration-mixing method

NUCLEAR STRUCTURE 156,158,160Gd, 158,162,164Dy, 160,162,164Er, 164,168,170Yb; calculated nuclear radii, deformation parameters β2 and β4, average pairing gaps for neutrons and protons for ground states in rare earth nuclei, levels, J, π, moment of inertia for ground-state rotational bands, detailed study of characteristics of the s-band in 164Er. Angular-momentum-projected multicranked configuration-mixing method with Gogny D1S force as effective interaction. Comparison with experimental data.

doi: 10.1103/PhysRevC.93.044317
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2016SH21      Phys.Rev. C 93, 064314 (2016)

M.Shimada, S.Watanabe, S.Tagami, T.Matsumoto, Y.R.Shimizu, M.Yahiro

Simultaneous analysis of matter radii, transition probabilities, and excitation energies of Mg isotopes by angular-momentum-projected configuration-mixing calculations

NUCLEAR STRUCTURE 24,26,28,30,32,34,36,38,40Mg; calculated potential-energy curves, level energies, rms matter radii, B(E2), β2, and probability distributions for the first 2+ and 4+ states. Beyond-mean-field (BMF) calculations with angular-momentum-projected configuration mixing with respect to the axially symmetric β2 deformation. Comparison with experimental data.

doi: 10.1103/PhysRevC.93.064314
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2015SH23      Prog.Theor.Exp.Phys. 2015, 063D02 (2015)

M.Shimada, S.Tagami, Y.R.Shimizu

Angular momentum projected multi-cranked configuration mixing for reliable calculation of high-spin rotational bands

NUCLEAR STRUCTURE 164Er, 40Mg, 152Dy; calculated excitation energy spectra of the ground-state rotational band, probability distribution over the five HFB configurations, angular momentum and rotational frequency, moments of inertia, B(E2). Comparison with available data.

doi: 10.1093/ptep/ptv073
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2014TA32      Phys.Rev. C 90, 061305 (2014)

M.Takechi, S.Suzuki, D.Nishimura, M.Fukuda, T.Ohtsubo, M.Nagashima, T.Suzuki, T.Yamaguchi, A.Ozawa, T.Moriguchi, H.Ohishi, T.Sumikama, H.Geissel, N.Aoi, R.-J.Chen, D.-Q.Fang, N.Fukuda, S.Fukuoka, H.Furuki, N.Inabe, Y.Ishibashi, T.Itoh, T.Izumikawa, D.Kameda, T.Kubo, M.Lantz, C.S.Lee, Y.-G.Ma, K.Matsuta, M.Mihara, S.Momota, D.Nagae, R.Nishikiori, T.Niwa, T.Ohnishi, K.Okumura, M.Ohtake, T.Ogura, H.Sakurai, K.Sato, Y.Shimbara, H.Suzuki, H.Takeda, S.Takeuchi, K.Tanaka, M.Tanaka, H.Uenishi, M.Winkler, Y.Yanagisawa, S.Watanabe, K.Minomo, S.Tagami, M.Shimada, M.Kimura, T.Matsumoto, Y.R.Shimizu, M.Yahiro

Evidence of halo structure in 37Mg observed via reaction cross sections and intruder orbitals beyond the island of inversion

NUCLEAR REACTIONS 12C(24Mg, X), (25Mg, X), (26Mg, X), (27Mg, X), (28Mg, X), (29Mg, X), (30Mg, X), (31Mg, X), (32Mg, X), (33Mg, X), (34Mg, X), (35Mg, X), (36Mg, X), (37Mg, X), (38Mg, X), E=240 MeV/nucleon, [secondary Mg beams from 9Be(48Ca, X), E=345 MeV/nucleon primary reaction]; measured spectra and TOF of outgoing particles, precise reaction σ using BigRIPS spectrometer at RIBF-RIKEN facility. Comparison with theoretical deformation parameter β2 versus mass plot using double-folding model (DFM) calculation combined with antisymmetrized molecular dynamics (AMD) calculation. 37Mg; deduced deformed halo effect from observed enhanced cross section, comparison with DFM calculation based on the deformed Woods-Saxon (DWS) model; collapse of N=28 magic shell for neutrons.

doi: 10.1103/PhysRevC.90.061305
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetE2471.


2014TA36      Phys.Scr. 89, 054013 (2014)

S.Tagami, M.Shimada, Y.Fujioka, Y.R.Shimizu, J.Dudek

Nuclear tetrahedral states and high-spin states studied using the quantum number projection method

NUCLEAR STRUCTURE 80,81,82Zr, 104Rh; calculated low-lying levels, J, π; deduced rotational spectra for tetrahedral deformation. 163Lu; calculated low and high spin levels, J, π, B(E2), triaxial superdeformed states. 40Mg; calculated moment of inertia. HFB mean field with allowance for triaxial superdeformed nuclei and tetrahedral deformation; preliminary. Compared with available data.

doi: 10.1088/0031-8949/89/5/054013
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2014WA14      Phys.Rev. C 89, 044610 (2014)

S.Watanabe, K.Minomo, M.Shimada, S.Tagami, M.Kimura, M.Takechi, M.Fukuda, D.Nishimura, T.Suzuki, T.Matsumoto, Y.R.Shimizu, M.Yahiro

Ground-state properties of neutron-rich Mg isotopes

NUCLEAR REACTIONS 12C(24Mg, X), (25Mg, X), (26Mg, X), (27Mg, X), (28Mg, X), (29Mg, X), (30Mg, X), (31Mg, X), (32Mg, X), (33Mg, X), (34Mg, X), (35Mg, X), (36Mg, X), (37Mg, X), (38Mg, X), E=240 MeV/nucleon; calculated reaction σ; deduced rms matter radii from reaction cross sections. Antisymmetrized molecular dynamics (AMD) with folding model and deformed Woods-Saxon model. Comparison with experimental data, and with other theoretical calculations.

NUCLEAR STRUCTURE 24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40Mg; calculated ground state binding J, π, S(n), S(2n) for 40Mg, β and γ deformation parameters, proton, neutron and matter radii, neutron skin thickness. 37Mg; calculated levels, J, π, neutron single-particle energies. Antisymmetrized molecular dynamics (AMD) with folding model and deformed Woods-Saxon model. Comparison with experimental data.

doi: 10.1103/PhysRevC.89.044610
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1974TA13      J.Phys.Soc.Jap. 37, 276 (1974)

Y.Takeda, M.Shimada, F.Kanamaru, M.Koizumi

Structure and Properties of CsFeBr3

NUCLEAR REACTIONS 57Fe(γ, γ); measured Mossbauer effect in CsFeBr.

doi: 10.1143/JPSJ.37.276
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