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NSR database version of May 19, 2024.

Search: Author = T.Naito

Found 25 matches.

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2024NA07      Nuovo Cim. C 47, 52 (2024)

T.Naito, G.Colo, T.Hatsuda, H.Liang, X.Roca-Maza, H.Sagawa

Possible inconsistency between phenomenological and theoretical determinations of charge symmetry breaking in nuclear energy density functionals

NUCLEAR STRUCTURE 10Be, 10C; calculated mass difference with the Green's function Monte Carlo (GFMC) with the Argonne v18 (AV18) and Urbana X (UX) interactions.

doi: 10.1393/ncc/i2024-24052-9
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2024SA06      Phys.Rev. C 109, L011302 (2024)

H.Sagawa, T.Naito, X.Roca-Maza, T.Hatsuda

QCD-based charge symmetry breaking interaction and the Okamoto-Nolen-Schiffer anomaly

doi: 10.1103/PhysRevC.109.L011302
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2023MI06      Phys.Rev. C 107, 054314 (2023)

F.Minato, T.Naito, O.Iwamoto

Nuclear many-body effects on particle emission following muon capture on 28Si and 40Ca

NUCLEAR REACTIONS 28Si, 40Ca(μ-, X), (μ-, pX), (μ-, d), (μ-, tX), (μ-, αX), (μ-, nX), E*<100 MeV ; calculated muon capture rate, particle yields after the muon capture, multiplicities of the emitted particles. Tamm-Dancoff approximation combined with the two-component exciton model, describing particle emission from the pre-equilibrium state. Hauser-Feshbach statistical model used for particle evaporation from the compound state. Comparison to available experimental data.

doi: 10.1103/PhysRevC.107.054314
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2023NA15      Phys.Rev. C 107, 054307 (2023)

T.Naito, T.Oishi, H.Sagawa, Z.Wang

Comparative study on charge radii and their kinks at magic numbers

NUCLEAR STRUCTURE 36,38,40,42,44,46,48,50,52,54,56,58,60,62Ca, 100,102,104,106,108,110,112,114,116,118,120,122,124,126,128,130,132,134,136,138,140,142,144Sn, 182,184,186,188,190,192,194,196,198,200,202,204,206,208,210,212,214,216,218,220,222Pb; calculated rms charge radii. 132Sn, 208Pb; calculated single-particle spectra, occupation numbers. Discussed sudden change of the mass-number dependence of the charge radius at the neutron shell gap - so-called kink behavior. Nonrelativistic Skyrme, relativistic mean field (RMF), and the relativistic Hartree-Fock (RHF) calculations. Comparison to experimental data.

doi: 10.1103/PhysRevC.107.054307
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2023NA16      Phys.Rev. C 107, 064302 (2023)

T.Naito, G.Colo, H.Liang, X.Roca-Maza, H.Sagawa

Effects of Coulomb and isospin symmetry breaking interactions on neutron-skin thickness

NUCLEAR STRUCTURE 16O, 40,48Ca, 48Ni, 208Pb; calculated neutron-skin-thickness. 40,48Ca; calculated charge radii difference between 40Ca and 48Ca. 48Ca, 48Ni; calculated mass difference of mirror nuclei.Investigated the influence of the corrections to the Hartree-Fock-Slater approximation by the Coulomb interaction and charge-symmetry breaking term originating from the strong interaction. Comparison to experimental values.

doi: 10.1103/PhysRevC.107.064302
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2023SO05      Phys.Rev. C 107, 035802 (2023)

H.Sotani, T.Naito

Empirical neutron star mass formula based on experimental observables

NUCLEAR STRUCTURE 132Sn, 208Pb; analyzed available experimental information on neutron-skin thickness and dipole polarizability; deduced equation of state parameters; calculated mass of neutron star, correlation between observables (neutron-skin thickness and dipole polarizability) and neutron stars parameters (mass, radius, gravitational redshift).

doi: 10.1103/PhysRevC.107.035802
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2023XI10      Phys.Lett. B 846, 138232 (2023)

H.H.Xie, T.Naito, J.Li, H.Liang

Revisiting the extraction of charge radii of 40Ca and 208Pb with muonic atom spectroscopy

NUCLEAR STRUCTURE 40Ca, 208Pb; calculated charge densities, together with the corresponding muonic transition energies using the covariant density functional theory as a benchmark; deduced nuclear charge radii from muonic atom spectroscopy.

doi: 10.1016/j.physletb.2023.138232
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2023YA26      Phys.Rev. C 108, 034315 (2023)

Z.-X.Yang, X.-H.Fan, T.Naito, Z.-M.Niu, Z.-Pa.Li, H.Liang

Calibration of nuclear charge density distribution by back-propagation neural networks

doi: 10.1103/PhysRevC.108.034315
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2022IT01      Phys.Rev. C 105, 024304 (2022)

N.Itagaki, T.Naito, Y.Hirata

Persistence of cluster structure in the ground state of 11B

NUCLEAR STRUCTURE 11B; calculated levels, J, π , rms radii, contribution of α+α+t cluster configuration to the ground and exited states. Antisymmetrized quasicluster model. Comparison to experimental data.

doi: 10.1103/PhysRevC.105.024304
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2022NA10      Phys.Rev. C 105, L021304 (2022)

T.Naito, G.Colo, H.Liang, X.Roca-Maza, H.Sagawa

Toward ab initio charge symmetry breaking in nuclear energy density functionals

NUCLEAR STRUCTURE 48Ca, 208Pb; calculated neutron skin thickness, mass difference for mirror nuclei 48Ca-48Ni, dependence of neutron-skin thickness on the charge symmetry breaking strength s0. Comparison to experimental data.

doi: 10.1103/PhysRevC.105.L021304
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2022NA32      Prog.Theor.Exp.Phys. 2022, 093D04 (2022)

T.Naito

Relativistic correction of the Coulomb interaction in the local density approximation for energies and radii in doubly-magic nuclei

NUCLEAR STRUCTURE 4He, 16O, 40,48Ca, 48Ni, 100,132Sn, 208Pb, 310120; analyzed available data; deduced effects of the relativistic correction of the Coulomb interaction on doubly-magic nuclei with Skyrme Hartree-Fock calculations.

doi: 10.1093/ptep/ptac122
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2022NA38      Phys.Rev. C 106, L061306 (2022)

T.Naito, X.Roca-Maza, G.Colo, H.Liang, H.Sagawa

Isospin symmetry breaking in the charge radius difference of mirror nuclei

NUCLEAR STRUCTURE 48Ca, 48Ni; calculated charge radius difference of mirror nuclei. Discussed the connection of obtained values with the nuclear equation of state and effect of isospin symmetry breaking on such relation. Hartree-Fock calculations with SAMi-J family of energy density functionals.

doi: 10.1103/PhysRevC.106.L061306
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2022SA22      Phys.Lett. B 829, 137072 (2022)

H.Sagawa, S.Yoshida, T.Naito, T.Uesaka, J.Zenihiro, J.Tanaka, T.Suzuki

Isovector density and isospin impurity in 40Ca

NUCLEAR STRUCTURE 40Ca; calculated proton and neutron densities with modified occupation probabilities of orbits around the Fermi energy, isospin impurity; deduced isoscalar (IS) and isovector (IV) densities. Comparison with theoretical densities calculated by Skyrme Hatree-Fock (HF) models.

doi: 10.1016/j.physletb.2022.137072
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2022SO04      Prog.Theor.Exp.Phys. 2022, 041D01 (2022)

H.Sotani, N.Nishimura, T.Naito

New constraints on the neutron-star mass and radius relation from terrestrial nuclear experiments

NUCLEAR STRUCTURE 208Pb, 90Zr; analyzed available data; deduced constraints for the neutron star mass and radius relation.

doi: 10.1093/ptep/ptac055
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2021AC04      Phys.Rev. C 103, 044304 (2021)

G.Accorto, T.Naito, H.Liang, T.Niksic, D.Vretenar

Nuclear energy density functionals from empirical ground-state densities

NUCLEAR STRUCTURE 16O, 40Ca, 56Ni, 100Sn; calculated sum of neutron vector and scalar potentials for 16O (N=Z=8 system) as a function of the radial coordinate, vector densities of four symmetric systems: 16O (N=Z=8), 40Ca (N=Z=20), 56Ni (N=Z=28) and 100Sn (N=Z=50) using density functional perturbation theory and the inverse Kohn-Sham method, with the improved relativistic energy density functional (EDF) DD-PC1 determined by empirical exact ground-state densities of finite systems.

doi: 10.1103/PhysRevC.103.044304
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2021IT02      Phys.Rev. C 103, 044303 (2021)

N.Itagaki, T.Naito

Consistent description for cluster dynamics and single-particle correlation

NUCLEAR STRUCTURE 12C; calculated energies curves of 0+ states, energy convergence for the lowest 0+ state, and level spacing of 0+ and 2+ states using 18 AQCM basis states, 50 proton and 50 neutron two-particle-two-hole states, and energy convergence of the 0+ state using 120 neutron and proton two-particle two-hole basis states coupled to the 18 AQCM basis states. Antisymmetrized quasicluster model (AQCM) with single-particle correlation and α cluster, based on a general framework of generator coordinate method (GCM).

doi: 10.1103/PhysRevC.103.044303
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2021NA16      Phys.Rev. C 104, 024316 (2021)

T.Naito, G.Colo, H.Liang, X.Roca-Maza

Second and fourth moments of the charge density and neutron-skin thickness of atomic nuclei

NUCLEAR STRUCTURE 36,38,40,42,44,46,48,50,52,54Ca, 100,102,104,106,108,110,112,114,116,118,120,122,124,126,128,130,132,134,136,138,140Sn; calculated second r2 and fourth r4 moments of the proton, neutron, and charge density distributions as function of mass number, correlation of proton second and fourth moments for 44,46Ca, 110,112Sn. Skyrme Hartree-Fock-Bogoliubov calculation with the assumption of axial symmetry using the code HFBTHO and SLy4 energy density functional. Comparison with experimental data. Relevance to extraction of neutron radius using the experimentally measured second and fourth moments of the charge distribution.

doi: 10.1103/PhysRevC.104.024316
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2021WA30      Chin.Phys.C 45, 064103 (2021)

Z.Wang, T.Naito, H.Liang, W.H.Long

Exploring effects of tensor force and its strength via neutron drops

doi: 10.1088/1674-1137/abf036
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2021WA32      Phys.Rev. C 103, 064326 (2021)

Z.Wang, T.Naito, H.Liang

Tensor-force effects on shell-structure evolution in N=82 isotones and Z=50 isotopes in the relativistic Hartree-Fock theory

NUCLEAR STRUCTURE 132Sn, 134Te, 136Xe, 138Ba, 140Ce, 142Nd, 144Sm, 146Gd, 148Dy, 150Er, 152Yb, 154Hf; 100,102,104,106,108,110,112,114,116,118,120,122,124,126,128,130,132Sn; calculated energy differences of ν1i13/2 and ν1h9/2 orbitals with respect to 140Ce for N=82 nuclei, and for π1h11/2 and π1g7/2 orbitals with respect to 108Sn for Z=50 nuclei using relativistic Hartree-Fock (RHF) theory with PKA1, PKO1, PKO2 and PKO3 effective interactions, with and without tensor-force contributions, the former with covariant density functional theory (CDFT), and compared with experimental data. 16,24O, 36S, 40,48,52,54Ca, 56,68,72Ni, 86Kr, 90Zr, 94Ru, 100,116,124,132Sn, 136Xe, 140Ce, 146Gd, 182,194,200,204,208,214Pb, 210Po, 214Ra, 218U; calculated binding energies and charge radii using the 'New' interaction and compared with results using PKO1 interaction, and with experimental data.

doi: 10.1103/PhysRevC.103.064326
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2020CI07      Phys.Rev. C 102, 034306 (2020)

M.Ciccarelli, F.Minato, T.Naito

Theoretical study of Nb isotope productions by muon capture reaction on 100Mo

NUCLEAR REACTIONS 100Mo(μ-, ν)100Nb, (μ-, n)99Nb, (μ-, 2n)98Nb, (μ-, 3n)97Nb, (μ-, 4n)96Nb, (μ-, 5n)95Nb, E not given; calculated production rates of Nb isotopes, and compared with experimental data at incident momentum=28 MeV/c for muons; calculated production rates and mean excitation energy of different Jπ states of Nb isotopes, neutron spectrum for 100Mo(μ-, xn) reaction. 92,94,96,98Mo(μ-, ν), (μ-, n), (μ-, 2n), (μ-, 3n), (μ-, 4n), (μ-, 5n), (μ-, X)87Nb/88Nb/89Nb/90Nb/91Nb/92Nb/93Nb/94Nb/95Nb/96Nb/97Nb/98Nb, E not given; calculated production rates of Nb isotopes from neutron emission and also charged-particle emissions; estimated muon intensity to produce enough 99Mo for medical diagnostics applications. Proton-neutron quasiparticle random phase approximation (pn-QRPA) on the basis of Skyrme-Hartree-Fock+BCS model (SHFBCS) for muon capture, and Hauser-Feshbach statistical model for particle evaporation process from the daughter nucleus.

doi: 10.1103/PhysRevC.102.034306
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2020NA19      Phys.Rev. C 101, 064311 (2020)

T.Naito, X.Roca-Maza, G.Colo, H.Liang

Effects of finite nucleon size, vacuum polarization, and electromagnetic spin-orbit interaction on nuclear binding energies and radii in spherical nuclei

NUCLEAR STRUCTURE 4He, 14,16,24O, 40,48Ca, 48Ni, 100,124,132,162Sn, 208Pb, 310126; calculated total energies, Coulomb energies, and charge radii, ratios of the Coulomb direct and exchange energies, mirror nuclei mass difference between 48Ca and 48Ni using self-consistent Skyrme Hartree-Fock method with generalized gradient approximation (GGA), and including electromagnetic effects of nucleon finite size, vacuum polarization, and electromagnetic spin-orbit interaction. Comparison with other theoretical predictions.

doi: 10.1103/PhysRevC.101.064311
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2020WA17      Phys.Rev. C 101, 064306 (2020)

Z.Wang, T.Naito, H.Liang, W.H.Long

Self-consistent random-phase approximation based on the relativistic Hartree-Fock theory: Role of ρ-tensor coupling

NUCLEAR STRUCTURE 48Ca, 90Zr, 208Pb; calculated energies and transition probabilities of isobaric analog states (IAS) and Gamow-Teller resonances, neutron and proton single-particle spectra. Random-phase approximation (RPA) based on the relativistic Hartree-Fock theory, extended with self-consistent ρ-meson tensor coupling. Comparison with experimental data for excitation energies and transition strength distributions.

doi: 10.1103/PhysRevC.101.064306
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2019NA03      Phys.Rev. C 99, 024309 (2019)

T.Naito, X.Roca-Maza, G.Colo, H.Liang

Coulomb exchange functional with generalized gradient approximation for self-consistent Skyrme Hartree-Fock calculations

NUCLEAR STRUCTURE 4He, 14,16,24O, 40,48Ca, 100,124,132,162Sn, 208Pb, 310126; calculated Coulomb exchange energies with the LDA and PBE-GGA Coulomb exchange functionals and compared with the exact-Fock energies, radial Coulomb exchange potential, proton and neutron density distributions, and proton single-particle energies in 208Pb using self-consistent Skyrme Hartree-Fock calculations with Coulomb exchange functional and generalized gradient approximation (GGA). Comparison with values calculated by local density approximation.

doi: 10.1103/PhysRevC.99.024309
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2018NA10      Phys.Rev. C 97, 044319 (2018)

T.Naito, R.Akashi, H.Liang

Application of a Coulomb energy density functional for atomic nuclei: Case studies of local density approximation and generalized gradient approximation

NUCLEAR STRUCTURE 4He, 12C, 16O, 40,48Ca, 58Ni, 116,124Sn, 206,208Pb; calculated direct, exchange, and correlation Coulomb energies, exchange energy densities weighted with charge-density distributions as a function of radius by the local density approximation (LDA), and by the generalized gradient approximation (GGA) using B88, PW91, PBE, and PBEsol energy density functionals; deduced deviation between LDA and generalized gradient approximation (GGA) exchange energies.

doi: 10.1103/PhysRevC.97.044319
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2013ON02      Phys.Lett. B 725, 277 (2013)

H.J.Ong, I.Tanihata, A.Tamii, T.Myo, K.Ogata, M.Fukuda, K.Hirota, K.Ikeda, D.Ishikawa, T.Kawabata, H.Matsubara, K.Matsuta, M.Mihara, T.Naito, D.Nishimura, Y.Ogawa, H.Okamura, A.Ozawa, D.Y.Pang, H.Sakaguchi, K.Sekiguchi, T.Suzuki, M.Taniguchi, M.Takashina, H.Toki, Y.Yasuda, M.Yosoi, J.Zenihiro

Probing effect of tensor interactions in 16O via (p, d) reaction

NUCLEAR REACTIONS 16O(p, d), E=198, 295, 392 MeV; measured reaction products; deduced σ(θ), tensor interaction in one-nucleon transfer reactions.

doi: 10.1016/j.physletb.2013.07.038
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