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NSR database version of May 24, 2024.

Search: Author = Y.Shikata

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2021CH24      Phys.Rev. C 103, 064311 (2021)

Y.Chiba, Y.Kanada-En'yo, Y.Shikata

Cluster correlation and nuclear vorticity in low-lying 1- states of 24Mg

NUCLEAR STRUCTURE 24Mg; calculated low-lying dipole K=0 and 1, 1- states, isoscalar toroidal dipole (TD) and compressional dipole (CD) strength, B(TD) and B(CD) strength functions of dipole transitions, energy curves and intrinsic matter density distributions for 20Ne+α, 16O+8Be, and 12C+12C quasicluster configurations, intrinsic transition current density for 0+ to K=1, 1- and 0+ to K=0, 1- transitions; deduced enhanced cluster structure but weaker vorticity for compressional dipole (CD) state. Antisymmetrized molecular dynamics framework combined with the generator coordinate (AMD+GCM) method, with the βγ constraint for the quadrupole deformation.

doi: 10.1103/PhysRevC.103.064311
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2021SH14      Phys.Rev. C 103, 034312 (2021)

Y.Shikata, Y.Kanada-En'yo

Low-energy dipole excitation mode in 18O with antisymmetrized molecular dynamics

NUCLEAR STRUCTURE 18O; calculated K-projected energy curves as a function of β, intrinsic density distributions of the basis wave functions, levels, J, K, π, B(E2) for the ground band and 14C+α cluster band, GCM amplitudes for the 1- states, B(E1), B(toroidal dipole, TD), B(compressive dipole, CD), and B(isoscalar dipole, ISD) strengths, TD and CD strength densities. Low-energy dipole (LED) excitations investigated by a combination of the variation after K projection (K-VAP) in the framework of antisymmetrized molecular dynamics (AMD) with β constraint in the generator coordinate method. Comparison with available experimental data.

doi: 10.1103/PhysRevC.103.034312
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2021SH31      Phys.Rev. C 104, 034314 (2021)

Y.Shikata, Y.Kanada-Enyo

Low-energy dipole excitations in 20O with antisymmetrized molecular dynamics

NUCLEAR STRUCTURE 20O; calculated levels, J, π, low-energy dipole (LED) excitations, B(E1), excited bands of Kπ=0+, 0- and 1- with cluster structures, K-projected energy curves as function of β2, matter density contours, GCM amplitudes of positive-, and negative-parity states, density distribution contours of protons, transition current densities, toroidal dipole (TD) strength densities. 16,18,20O; energies of 0+ and 1- levels, intrinsic matter density contours of excited states, isoscalar (IS) dipole strength, proton, and neutron components of toroidal dipole (TD) and compressive dipole (CD) strengths, B(E1) for first two 1- states. Variation after K projection (K-VAP) and deformation β-constraint antisymmetrized molecular dynamics (AMD) combined with the generator coordinate method (GCM) for low-energy dipole excitations. Comparison with available experimental data.

doi: 10.1103/PhysRevC.104.034314
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2020KA36      Phys.Rev. C 102, 014607 (2020)

Y.Kanada-Enyo, Y.Shikata, Y.Chiba, K.Ogata

Neutron dominance in excited states of 26Mg and 10Be probed by proton and α inelastic scattering

NUCLEAR STRUCTURE 10Be, 26Mg; calculated levels, J, π, rms proton-, neutron-, and matter-radii, isoscalar monopole strengths for E0 transitions, B(E2), B(E1), B(E3), B(E4), charge form factors, and proton and neutron diagonal and transition densities, proton and neutron densities of various states in 10Be using antisymmetrized molecular dynamics (AMD) model. Comparison with experimental data.

NUCLEAR REACTIONS 26Mg(p, p'), (p, p), E=24, 40, 60, 100 MeV; 26Mg(α, α'), (α, α), E=104, 120, 240, 400 MeV; 10Be, 10C(p, p'), (p, p), E=25, 40, 45, 60, 100 MeV; 26Mg(α, α'), (α, α), E=25, 68, 100 MeV/nucleon; calculated differential σ(θ, E), radial dependences and volume integrals of the real and imaginary parts of the present microscopic potentials. Microscopic coupled-channel (MCC) method with Melbourne g-matrix folding approach and using the matter and transition densities of the target nuclei from AMD calculations. Comparison with experimental data. Discussed cluster bands.

doi: 10.1103/PhysRevC.102.014607
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2020SH18      Prog.Theor.Exp.Phys. 2020, 073D01 (2020)

Y.Shikata, Y.Kanada-Enyo

Variation after K-projection in antisymmetrized molecular dynamics for low-energy dipole excitations in 10Be and 16O

NUCLEAR STRUCTURE 10Be, 16O; calculated energy surfaces and levels, J, π, low-energy dipole excitations energies and transition strengths using the framework of antisymmetrized molecular dynamics with the β-constraint.

doi: 10.1093/ptep/ptaa092
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2019KA28      Phys.Rev. C 100, 014301 (2019)

Y.Kanada-En'yo, Y.Shikata

Isoscalar dipole excitations in 16O

NUCLEAR STRUCTURE 16O; calculated binding energies, excitation energies, density distributions, rms matter radii, isoscalar monopole (IS0) and dipole (IS1) transition matrix elements, transition probabilities, IS0 and IS1 elastic and inelastic form factors, transition densities and currents of 0+ and 1- states, energy weighted strength functions of compressive dipole (CD) and toroidal dipole (TD) transitions; deduced that significant strengths of the IS monopole and dipole transitions lie in the low-energy region below the giant resonances, from a variety of low-energy dipole modes such as the vortical dipole mode in the first 1 state of the vibrating tetrahedral 4α and the 12C+α cluster structure in the second 1 state. Shifted basis antisymmetrized molecular dynamics, combined with generator coordinate method.

doi: 10.1103/PhysRevC.100.014301
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2019SH25      Prog.Theor.Exp.Phys. 2019, 063D01 (2019)

Y.Shikata, Y.Kanada-En'yo, H.Morita

Low-energy dipole excitation modes in 10Be

NUCLEAR STRUCTURE 10Be; calculated dipole transition strengths, α- and 2n-cluster distributions, transition current densities.

doi: 10.1093/ptep/ptz049
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2018KA09      Phys.Rev. C 97, 014303 (2018)

Y.Kanada-Enyo, Y.Shikata, H.Morita

Cluster and toroidal aspects of isoscalar dipole excitations in 12C

NUCLEAR STRUCTURE 12C; calculated isoscalar dipole strength functions and energy-weighted strengths of toroidal dipole (TD), compressive dipole (CD), and vortical dipole (VD) transitions, EWSR ratio of the energy-weighted isoscalar dipole (IS1) strengths, occupation probability of harmonic oscillator quanta in shell-model basis expansion of 0+ and 1- states, density distributions of the dominant configurations for 0+ and 1- states, transition current density for 0+ to 1- transition, 3α cluster states. Cluster and toroidal aspects of isoscalar dipole (ISD) excitations, based on shifted-basis antisymmetrized molecular dynamics (sAMD)+generator coordinate method (GCM), and the sAMD with various configurations.

doi: 10.1103/PhysRevC.97.014303
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2017KA06      Phys.Rev.Lett. 118, 052701 (2017)

T.Kawabata, Y.Fujikawa, T.Furuno, T.Goto, T.Hashimoto, M.Ichikawa, M.Itoh, N.Iwasa, Y.Kanada-Enyo, A.Koshikawa, S.Kubono, E.Miyawaki, M.Mizuno, K.Mizutani, T.Morimoto, M.Murata, T.Nanamura, S.Nishimura, S.Okamoto, Y.Sakaguchi, I.Sakata, A.Sakaue, R.Sawada, Y.Shikata, Y.Takahashi, D.Takechi, T.Takeda, C.Takimoto, M.Tsumura, K.Watanabe, S.Yoshida

Time-Reversal Measurement of the p -Wave Cross Sections of the 7Be(n, α)4Fe Reaction for the Cosmological Li Problem

NUCLEAR REACTIONS 4He(α, n), E=39.15, 38.76 MeV; measured reaction products, En, In, Eγ, Iγ; deduced σ(θ), σ. Comparison with available data.

doi: 10.1103/PhysRevLett.118.052701
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Data from this article have been entered in the EXFOR database. For more information, access X4 dataset23366.

2017KA28      Phys.Rev. C 95, 064319 (2017)

Y.Kanada-Enyo, Y.Shikata

Toroidal, compressive, and E1 properties of low-energy dipole modes in 10Be

NUCLEAR STRUCTURE 10Be; calculated energy-weighted dipole (E1) strengths of giant resonances, intrinsic proton and neutron density distributions and transition current densities. Shifted-basis antisymmetrized molecular dynamics (sAMD), combined with the α-cluster generator coordinate method (αGCM) taking into account 1p-1h excitations and large amplitude cluster modes to describe low-energy dipole strengths for cluster modes and high-energy ones for GDRs.

doi: 10.1103/PhysRevC.95.064319
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1981SH11      Z.Phys. A300, 217 (1981)

Y.Shikata, M.Sakakura, T.Sebe

A Shell-Model Study on M1 and E2 Properties of Zn, Ga, and Ge

NUCLEAR STRUCTURE 67,69Ga, 65,67Zn, 69Ge; calculated B(E2), B(M1), δ, S; 64,66,68Zn, 70Ge; calculated B(E2). Shell model, effective charges.

doi: 10.1007/BF01412297
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1979SA04      Z.Phys. A289, 163 (1979)

M.Sakakura, Y.Shikata, A.Arima, T.Sebe

Calculations of the Energy Spectra of Zn, Ga, and Ge Isotopes by the Shell Model

NUCLEAR STRUCTURE 65,66,67,68Zn, 67,68,69Ga, 68,69,70Ge; calculated energy spectra. Effective shell-model Hamiltonian with neutrons in p, F shells.

doi: 10.1007/BF01435934
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1972SH18      Phys.Lett. 40B, 611 (1972)


The Calculation of the States in 53Fe

NUCLEAR STRUCTURE 53Fe; calculated levels, S.

doi: 10.1016/0370-2693(72)90608-9
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1972SH29      Progr.Theor.Phys. 48, 345 (1972)


The Method of Variation after Projection Applied to 44Ti

NUCLEAR STRUCTURE 44Ti; calculated levels, quadrupole moment, B(E2). Variation after projection method.

doi: 10.1143/PTP.48.345
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