NSR Query Results
Output year order : Descending NSR database version of April 26, 2024. Search: Author = Y.Chiba Found 16 matches. 2022IS04 Phys.Rev. C 105, 064314 (2022) C.Ishizuka, H.Takemoto, Y.Chiba, A.Ono, N.Itagaki Role of tensor interaction as salvation of cluster structure in 44Ti NUCLEAR STRUCTURE 44Ti; calculated energy curves and rms matter radius for the 0+ state as a function of the distance between 4He and 40Ca using antisymmetrized quasicluster model (AQCM) and iSMT model, with tensor interaction; discussed competition of spin-orbit and tensor effects in the medium-heavy region nuclei. Comparison with theoretical predictions of Brink Model, and with experimental data. Relevance to ongoing experimental projects to investigate knockout α clusters from medium-heavy nuclei.
doi: 10.1103/PhysRevC.105.064314
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
2021OG03 Prog.Theor.Exp.Phys. 2021, 103D01 (2021) Correspondence between isoscalar monopole strengths and α inelastic cross sections on 24Mg NUCLEAR REACTIONS 24Mg(α, α'), E=130, 386 MeV; analyzed available data; calculated σ(θ), transition strengths using antisymmetrized molecular dynamics (AMD). Microscopic coupled-channel framework.
doi: 10.1093/ptep/ptab112
2021PH04 Phys.Lett. B 819, 136466 (2021) N.T.T.Phuc, M.Lyu, Y.Chiba, K.Ogata Manifestation of the divergence between antisymmetrized-molecular-dynamics and container pictures of 9Be via 9Be(p, pn)8Be knockout reaction NUCLEAR REACTIONS 9Be(p, np), E=317 MeV; analyzed available data; deduced σ(θ), divergence between the antisymmetrized molecular dynamics and the container pictures in the theoretical descriptions of the 9Be nucleus and proposed to probe the corresponding spatial extensions of the nuclear π-orbit.
doi: 10.1016/j.physletb.2021.136466
2021TA11 Phys.Rev. C 103, L031305 (2021) Y.Taniguchi, K.Yoshida, Y.Chiba, Y.Kanada-En'yo, M.Kimura, K.Ogata Unexpectedly enhanced α-particle preformation in 48Ti probed by the (p, pα) reaction NUCLEAR REACTIONS 48Ti(p, pα)44Ca, E=101.5 MeV; calculated wave-function density distribution contours for α+44Ca system, reduced width amplitude (RWA), triple-differential cross sections via distorted wave impulse approximation (DWIA), binding energy, charge radii, and E2 transition matrix of 44Ti using mean-field solution and α+44Ca wave function; deduced unexpected enhanced α-particle preformation in medium-mass 48Ti nucleus.
doi: 10.1103/PhysRevC.103.L031305
2020CH06 Phys.Rev. C 101, 024317 (2020) Hoyle-analog state in 13C studied with antisymmetrized molecular dynamics NUCLEAR STRUCTURE 13C; calculated levels, J, π, Hoyle-analog states, cluster configurations, intrinsic matter and valence neutron density distribution contours, reduced width amplitudes (RWAs) in 12C+n and 9Be+α channels, rms matter radii, S factors. Antisymmetrized molecular dynamics using Gogny D1S and modified Gogny D1S interactions. Comparison with experimental data.
doi: 10.1103/PhysRevC.101.024317
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
2019YO04 Phys.Rev. C 100, 044601 (2019) K.Yoshida, Y.Chiba, M.Kimura, Y.Taniguchi, Y.Kanada-En'yo, K.Ogata Quantitative description of the 20Ne(p, pα)16O reaction as a means of probing the surface α amplitude NUCLEAR REACTIONS 20Ne(p, pα)16O, E=101.5 MeV; calculated differential σ(θ) and reduced width amplitudes (RWA) within the Distorted Wave Impulse Approximation (DWIA) framework. Antisymmetrized Molecular Dynamics (AMD) used to describe α cluster states of 20Ne, and its RWA obtained by the Laplace expansion method. Comparison made with available experimental data. The cross section for this reaction is quantitatively reproduced by this framework. Investigated relationship between the α cluster wave function and the α knockout cross section.
doi: 10.1103/PhysRevC.100.044601
2017CH20 Phys.Rev. C 95, 044328 (2017) Y.Chiba, Y.Taniguchi, M.Kimura Inversion doublets of reflection-asymmetric clustering in 28Si and their isoscalar monopole and dipole transitions NUCLEAR STRUCTURE 28Si; calculated levels, J, π, B(E2), isoscalar monopole and dipole transition strengths, intrinsic matter density distributions, cluster bands of 24Mg+α, 16O+12C, and 20Ne+2α cluster configurations, oblate deformed ground state, cluster S factors for the ground and excited 0+ states; deduced existence of inversion doublets. Antisymmetrized molecular dynamics with Gogny D1S effective interaction. Comparison with experimental data.
doi: 10.1103/PhysRevC.95.044328
2016CH10 Phys.Rev. C 93, 034319 (2016) Y.Chiba, M.Kimura, Y.Taniguchi Isoscalar dipole transition as a probe for asymmetric clustering NUCLEAR STRUCTURE 20Ne, 44Ti; calculated isoscalar (IS) monopole and dipole (E1) transition strengths by deriving an analytic expression for the IS dipole transition matrix using Brink-Bloch generator coordinate method (GCM) and antisymmetrized molecular dynamics (AMD); calculated levels, J, π, bands, α+16O and α+40Ca cluster states. Comparison with experimental data.
doi: 10.1103/PhysRevC.93.034319
2015CH36 Phys.Rev. C 91, 061302 (2015) Cluster states and isoscalar monopole transitions of 24Mg NUCLEAR STRUCTURE 24Mg; calculated energies and isoscalar monopole transition strengths of excited 0+ states, intrinsic density distributions, energy weighted sums; deduced EWSR, mixed nature of mean-field and 20Ne+α, 12C+12C, and 5α-pentagon+α cluster states configurations. Antisymmetrized molecular dynamics combined with the generator coordinate method and Gogny D1S interaction. Comparison with experimental data.
doi: 10.1103/PhysRevC.91.061302
2014BA61 Phys.Rev. C 90, 064319 (2014) 3α clustering in excited states of 16C NUCLEAR STRUCTURE 16C; calculated energy curve of 0+ states as functions of quadrupole deformation parameter, density distribution contours, levels, J, π, bands, proton and neutron root-mean-square radii, B(E2) for the ground, triangular, and linear-chain configurations of the 8He+8Be, 6He+10Be and 4He+12Be clusters. Prediction of the presence of rotational bands associated with 3α cluster states, and yrast 10+ state at 27.8 MeV. Antisymmetrized molecular dynamics (AMD) calculations for 3α clusters.
doi: 10.1103/PhysRevC.90.064319
2014CH23 Phys.Rev. C 89, 054313 (2014) Collectivity and instability of the N=Z=28 shell gap and strongly deformed bands with g9/2 configuration in 56Ni NUCLEAR STRUCTURE 56Ni; calculated energy surfaces contours in (β-γ) plane, neutron single-particle energies, density distributions, levels, J, π, normal and superdeformed ground, beta and gamma bands, B(E2), E0 matrix elements, generator coordinate method (GCM) amplitudes, deformation parameters, moments of inertia. Generator coordinate method (GCM), and antisymmetrized molecular dynamics (AMD) calculations with Gogny D1S effective interaction. Comparison with experimental data.
doi: 10.1103/PhysRevC.89.054313
1981NA05 Nucl.Phys. A365, 457 (1981) T.Nakamura, Y.Chiba, M.Aoki, S.Kaneko Multiparticle Emission in the Interactions of Hadrons with Complex Nuclei at Incident Momenta from 2 to 4 GeV/c NUCLEAR REACTIONS Be, Cu, Ta(π-, π-), (π-, π+), (π-, p), (π+, π-), (π+, π+), (π+, p), (p, p), (p, π+), (p, π-), E at 2-4 GeV/c; measured σ(reaction) vs A, σ(Ep, θ) vs pion momentum, average multiplicity vs mass, E. Bubble chamber, natural target. Intranuclear cascade model.
doi: 10.1016/0375-9474(81)90401-2
1970KO15 J.Phys.Soc.Jap. 29, 1 (1970) S.Kobayashi, S.Motonaga, Y.Chiba, K.Katori, A.Stricker, T.Fujisawa, T.Wada Spin Flip in the Inelastic Scattering of Protons from 12C at Energies Around 13.1 MeV Resonance NUCLEAR REACTIONS 12C(p, p'), E=12-14 MeV; measured σ(E;θ), spin-flip probability(θ). 12C(p, p), E=12-14 MeV; measured σ(E;θ).
doi: 10.1143/JPSJ.29.1
1970NA01 Nucl.Phys. A140, 417 (1970) N.Nakanishi, Y.Chiba, Y.Awaya, K.Matsuda Elastic Scattering of 3He Particles on Ca at Five Incident Energies between 18.8 and 39.3 MeV NUCLEAR REACTIONS Ca(3He, 3He), E=18.8, 24.9, 31, 34.4, 39.3 MeV; measured σ(E;θ); deduced optical model parameters. Natural Ca target.
doi: 10.1016/0375-9474(70)90335-0
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