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NSR database version of April 11, 2024.

Search: Author = M.Kimura

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2024KI03      Eur.Phys.J. A 60, (2024)

M.Kimura, Y.Taniguchi

Shape of 12C

NUCLEAR STRUCTURE 12C; analyzed available data; deduced energy levels, J, π, charge form factor, intrinsic densities, reconstructed density exhibits a triangular shape, suggesting the formation of α clusters in the ground rotational band.

doi: 10.1140/epja/s10050-024-01302-w
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2024TA06      Phys.Lett. B 849, 138434 (2024)

Y.Taniguchi, M.Kimura

Impact of the molecular resonances on the C12+12C fusion reaction rate

NUCLEAR REACTIONS 12C(12C, X), E(cm)=0.5-4 MeV; calculated σ, S-factor, resonance parameters with a full-microscopic nuclear model employing various nuclear energy Skyrme and Gogny density functionals. Comparison with available data.

doi: 10.1016/j.physletb.2023.138434
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2024UT01      Phys.Rev. C 109, 014617 (2024)

H.Utsunomiya, S.Goriely, M.Kimura, N.Shimizu, Y.Utsuno, G.M.Tveten, T.Renstrom, T.Ari-izumi, S.Miyamoto

Photoneutron emission cross sections for 13C

doi: 10.1103/PhysRevC.109.014617
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2024ZH14      Phys.Lett. B 850, 138511 (2024)

Q.Zhao, M.Kimura, B.Zhou, S.-h.Shin

Microscopic investigation of one- and two-proton decay from the excited states of 10C

RADIOACTIVITY 10C(p), (2p), 9B(p); calculated decay widths with R-matrix method. Comparison with experimental data. Microscopic cluster model.

doi: 10.1016/j.physletb.2024.138511
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2023TA04      Phys.Rev. C 107, 024314 (2023)

R.Takatsu, Y.Suzuki, W.Horiuchi, M.Kimura

Microscopic study of the deformed neutron halo of 31Ne

NUCLEAR STRUCTURE 30,31Ne; calculated levels, J, p, S(n), point-proton and neutron distribution radii, quadrupole moments of protons and neutrons. 31Ne; calculated neutron single-particle energies, occupation numbers from the five most weakly bound neutrons, spectroscopic factor of ground and excited states, widths of the resonances 30Ne+n. Antisymmetrized molecular dynamics plus resonating group method (AMD+RGM) combined with analytical continuation of the coupling constant (ACCC) to improve the description of resonance states. Showed that 31Ne is a deformed halo nucleus in which the rotational excitation of the core is coupled with a deformed neutron halo. Comparison to experimental data and calculations performed with antisymmetrized molecular dynamics plus generator coordinate method (AMD+GCM).

doi: 10.1103/PhysRevC.107.024314
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2023YA30      Phys.Rev.Lett. 131, 242501 (2023)

Z.H.Yang, Y.L.Ye, B.Zhou, H.Baba, R.J.Chen, Y.C.Ge, B.S.Hu, H.Hua, D.X.Jiang, M.Kimura, C.Li, K.A.Li, J.G.Li, Q.T.Li, X.Q.Li, Z.H.Li, J.L.Lou, M.Nishimura, H.Otsu, D.Y.Pang, W.L.Pu, R.Qiao, S.Sakaguchi, H.Sakurai, Y.Satou, Y.Togano, K.Tshoo, H.Wang, S.Wang, K.Wei, J.Xiao, F.R.Xu, X.F.Yang, K.Yoneda, H.B.You, T.Zheng

Observation of the Exotic 0+2 Cluster State in 8He

NUCLEAR REACTIONS C, 1H(8He, 8He), E=82.3 MeV/nucleon; measured reaction products, En, In. 6,8He; deduced σ(θ), resonant state J, π, large isoscalar monopole transition strength, and the emission of a strongly correlated neutron pair. Comparison with theoretical calculations. RIPS beam line of RIKEN Nishina Center.

doi: 10.1103/PhysRevLett.131.242501
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2022BA19      Phys.Rev. C 105, L061301 (2022)

T.Baba, Y.Taniguchi, M.Kimura

4α linear-chain state produced by 9Be + 9Be collisions

NUCLEAR STRUCTURE 18O; calculated levels, J, π, B(E2), moments of inertia, α- and 9Be-decay widths, bands structure. Calculations assuming 4α+2n linear chain structure in 18O and based on antisymmetrized molecular dynamics (AMD). Discussed the possibility of production linear-chain of 18O in 9Be+9Be heads-on collisions.

doi: 10.1103/PhysRevC.105.L061301
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2022BL08      Eur.Phys.J. A 58, 236 (2022)

D.Blaschke, H.Horiuchi, M.Kimura, G.Ropke, P.Schuck

Topical collection on light clusters in nuclei and nuclear matter: nuclear structure and decay, heavy-ion collisions, and astrophysics

doi: 10.1140/epja/s10050-022-00867-8
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2022HA10      Phys.Rev. C 105, 044302 (2022)

J.X.Han, Y.Liu, Y.L.Ye, J.L.Lou, X.F.Yang, T.Baba, M.Kimura, B.Yang, Z.H.Li, Q.T.Li, J.Y.Xu, Y.C.Ge, H.Hua, Z.H.Yang, J.S.Wang, Y.Y.Yang, P.Ma, Z.Bai, Q.Hu, W.Liu, K.Ma, L.C.Tao, Y.Jiang, L.Y.Hu, H.L.Zang, J.Feng, H.Y.Wu, S.W.Bai, G.Li, H.Z.Yu, S.W.Huang, Z.Q.Chen, X.H.Sun, J.J.Li, Z.W.Tan, Z.H.Gao, F.F.Duan, J.H.Tan, S.Q.Sun, Y.S.Song

Observation of the π2σ2-bond linear-chain molecular structure in 16C

NUCLEAR REACTIONS 2H(16C, X)16C/2H/1H/2H/3H/3He/4He/5He/6He/6Li/7Li/8Li/9Li/7Be/8Be/9Be/10Be/11Be/12Be, E=23.5 MeV/nucleon; measured reaction products, recoil 2H, 8Be and other outgoing particles; deduced Q-value spectra for breakup of excited states of 16C into 4He+12Be and 6He+10Be channels, angular correlation between 4He and 12Be decay fragments from the 16.5 MeV resonance in 16C, and 6He and 10Be fragments from the 19.4 MeV resonance in 16C. 16C; deduced excitation energy spectra reconstructed from 4He+12Be+2 H and 6He+10Be+2H channels, levels, resonances, total width. Comparison with previous experimental data, and with antisymmetrized molecular dynamics (AMD) theoretical calculations. Secondary 16C beam produced in 9Be(18O, X), E=59.6 MeV/nucleon primary reaction at the HIRFL-RIBLL facility in Lanzhou.

doi: 10.1103/PhysRevC.105.044302
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2022KI01      Phys.Rev. C 105, 014311 (2022)

M.Kimura, Y.Suzuki, T.Baba, Y.Taniguchi

Description of isospin mixing by a generator coordinate method

NUCLEAR STRUCTURE 14C, 14N; calculated energy curves as functions of quadrupole deformation parameter β. 14N; calculated levels, J, π, isospin T=1 components. 14N; calculated B(M1), B(E1), B(E2), magnetic dipole moments, electric quadrupole moments, spectroscopic factors, and overlap functions for low-lying, low-spin positive- and negative-parity states. Generator coordinate method (GCM) by applying the Fermi transition operator to the wave functions of isobars, for describing isospin mixing. Comparison with experimental data.

doi: 10.1103/PhysRevC.105.014311
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2022MA11      Few-Body Systems 63, 20 (2022)

H.Masui, W.Horiuchi, M.Kimura

Two-Neutron Halo Structure and Anti-halo Effect in 31F

NUCLEAR STRUCTURE 29,31F; calculated the radius and total reaction cross section using a three-body wave function, anti-halo effect that suppresses the halo structure in the ground state.

doi: 10.1007/s00601-021-01715-z
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2022MO36      Prog.Theor.Exp.Phys. 2022, 113D01 (2022)

H.Motoki, Y.Suzuki, T.Kawai, M.Kimura

Cluster formation in neutron-rich Be and B isotopes

NUCLEAR STRUCTURE 10,12,14Be, 11,13,15,17,19B; calculated quadrupole deformation parameters, the RMS proton, neutron, and matter distribution radii of the Be and B isotopes and the principal neutron quantum numbers, magnetic moments of the B isotopes within the approximated shell model(SM) and molecular orbital (MO) configurations. Comparison with available data.

doi: 10.1093/ptep/ptac145
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2022SU12      Prog.Theor.Exp.Phys. 2022, 063D02 (2022)

Y.Suzuki, W.Horiuchi, M.Kimura

Erosion of N = 28 shell closure: Shape coexistence and monopole transition

NUCLEAR STRUCTURE 40Mg, 42Si, 44S; calculated energy levels, J, π, potential energy surfaces, B(E2) using the theoretical framework of antisymmetrized molecular dynamics with the Gogny D1S density functional; deduced different aspects of shape coexistence.

doi: 10.1093/ptep/ptac071
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2022ZH11      Eur.Phys.J. A 58, 25 (2022)

Q.Zhao, B.Zhou, M.Kimura, H.Motoki, S.-h.Shin

Microscopic calculations of 6He and 6Li with real-time evolution method

NUCLEAR STRUCTURE 6He, 6Li; calculated low-lying cluster states, J, π, rms radii by the real-time evolution method (REM) which generates basis wave functions for the generator coordinate method (GCM) from the equation of motion of Gaussian wave packets.

doi: 10.1140/epja/s10050-021-00648-9
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2022ZH64      Phys.Rev. C 106, 054313 (2022)

Q.Zhao, M.Kimura, B.Zhou, S.-h.Shin

α-formation probability in 10Be and 12Be within a microscopic cluster model

NUCLEAR STRUCTURE 4,6,8He, 10,12Be; calculated ground state energy. 10,12Be; calculated rms radii of point neutron and proton distributions, charge radius, reduced width amplitude, spectroscopic factors. Calculations within the framework of generator coordinates method (GCM) with the real-time evolution method (REM) where the equation of motion of the Gaussian wave packets is used to generate basis wave functions, with various cluster configurations. Comparison with experimental data and other theoretical calculations.

doi: 10.1103/PhysRevC.106.054313
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2021AD09      Phys.Rev. C 103, 044315 (2021)

P.Adsley, V.O.Nesterenko, M.Kimura, L.M.Donaldson, R.Neveling, J.W.Brummer, D.G.Jenkins, N.Y.Kheswa, J.Kvasil, K.C.W.Li, D.J.Marin-Lambarri, Z.Mabika, P.Papka, L.Pellegri, V.Pesudo, B.Rebeiro, P.-G.Reinhard, F.D.Smit, W.Yahia-Cherif

Isoscalar monopole and dipole transitions in 24Mg, 26Mg, and 28Si

NUCLEAR REACTIONS 24,26Mg, 28Si(α, α'), E=200 MeV; measured E(α), I(α), differential σ(θ) using K600 magnetic spectrometer for momentum analysis of α particles, and two multiwire drift chambers and two plastic scintillators at the iThemba LABS accelerator facility. 24,26Mg, 28Si; deduced levels, J, π, deformation parameters, percentage of the energy weighted sum rule (EWSR) for a level, B(E1), strength distributions for isoscalar dipole (IS1) and isoscalar monopole transitions (IS0), configurations. Comparison with Skyrme quasiparticle random-phase approximation (QRPA) and antisymmetrized molecular dynamics+generator coordinate method (AMD+GCM) calculations, and with experimental data in the ENSDF database.

doi: 10.1103/PhysRevC.103.044315
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetD1003. Data from this article have been entered in the XUNDL database. For more information, click here.


2021CH55      Phys.Rev. C 104, 054313 (2021)

V.Choudhary, W.Horiuchi, M.Kimura, R.Chatterjee

Enormous nuclear surface diffuseness of Ne and Mg isotopes in the island of inversion

NUCLEAR STRUCTURE 20,21,22,23,24,25,26,27,28,29,30,31,32,33,34Ne, 24,25,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40Mg; calculated nuclear surface diffuseness as a function of neutron number, occupation numbers; analyzed nuclear surface diffuseness parameters and rms point matter radii from experimental elastic scattering differential cross sections at 350-, 500- and 800-MeV incident energies. 29Ne; calculated valence neutron density distribution. Microscopic antisymmetrized molecular dynamics (AMD) model, and two-parameter Fermi density distribution for the diffuseness parameters and matter radii.

doi: 10.1103/PhysRevC.104.054313
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2021DA12      Eur.Phys.J. A 57, 203 (2021)

M.Dan, R.Chatterjee, M.Kimura

A description of the structure and electromagnetic breakup of 11Be with microscopic inputs

NUCLEAR STRUCTURE 10,11Be; calculated proton and neutron densitydistributions, energy levels, J, π, one-neutron separation energy, spectroscopic factors using AMD and AMD+RGM.

doi: 10.1140/epja/s10050-021-00526-4
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2021SH20      Phys.Rev. C 103, 054313 (2021)

S.Shin, B.Zhou, M.Kimura

Shape of 13C studied by the real-time evolution method

NUCLEAR STRUCTURE 13C; calculated levels, J, π, B(E2), bands based on E2 transition strengths, energies and radii of the first 1/2- and 5/2+ states, overlap between REM wave function and the basis wave function for 1/2- and 1/2+ states, density distributions of the basis wave functions for 1/2- and 1/2+ states; deduced the ground band as a rigid-body rotational band manifesting triangular symmetry. Real-time evolution method (REM) using the equation-of-motion of cluster of 3α+n system without any assumption of symmetry. Comparison of level structures with the experimental data.

doi: 10.1103/PhysRevC.103.054313
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2021SH42      Few-Body Systems 62, 93 (2021)

S.Shin, B.Zhou, M.Kimura

The Isoscalar Monopole Strength of 13C

NUCLEAR STRUCTURE 13C; calculated energy levels, J, π, density distributions of the Brink-Bloch wave functions, monopole strengths, radii, extra neutron causes the shrinkage of 3α.

doi: 10.1007/s00601-021-01671-8
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2021SU18      Phys.Rev. C 104, 024327 (2021)

Y.Suzuki, M.Kimura

Triaxial deformation and the disappearance of the N=28 shell gap

NUCLEAR STRUCTURE 38,40,42Mg, 40,42,44Si, 42,44,46S, 44,46,48Ar; calculated potential energy surfaces, squared GCM amplitudes and occupation numbers for ground states in (β, γ) plane, energies, spins, B(E2) and quadrupole moments of low-lying positive-parity levels for N=26, 28 and 30 isotones. 42Mg, 44Si, 46S, 48Ar; calculated proton and neutron single-particle levels as function of β and γ deformation parameters for N=30 isotones; investigated nature and cause of the nuclear deformations and its relation to the disappearance of the neutron magic number N=28 in vicinity of 42Si. Antisymmetrized molecular dynamics (AMD) calculations with Gogny D1S density functional. Comparison with experimental data.

doi: 10.1103/PhysRevC.104.024327
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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
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2021YA07      Phys.Rev.Lett. 126, 082501 (2021)

Z.H.Yang, Y.Kubota, A.Corsi, K.Yoshida, X.-X.Sun, J.G.Li, M.Kimura, N.Michel, K.Ogata, C.X.Yuan, Q.Yuan, G.Authelet, H.Baba, C.Caesar, D.Calvet, A.Delbart, M.Dozono, J.Feng, F.Flavigny, J.-M.Gheller, J.Gibelin, A.Giganon, A.Gillibert, K.Hasegawa, T.Isobe, Y.Kanaya, S.Kawakami, D.Kim, Y.Kiyokawa, M.Kobayashi, N.Kobayashi, T.Kobayashi, Y.Kondo, Z.Korkulu, S.Koyama, V.Lapoux, Y.Maeda, F.M.Marques, T.Motobayashi, T.Miyazaki, T.Nakamura, N.Nakatsuka, Y.Nishio, A.Obertelli, A.Ohkura, N.A.Orr, S.Ota, H.Otsu, T.Ozaki, V.Panin, S.Paschalis, E.C.Pollacco, S.Reichert, J.-Y.Rousse, A.T.Saito, S.Sakaguchi, M.Sako, C.Santamaria, M.Sasano, H.Sato, M.Shikata, Y.Shimizu, Y.Shindo, L.Stuhl, T.Sumikama, Y.L.Sun, M.Tabata, Y.Togano, J.Tsubota, F.R.Xu, J.Yasuda, K.Yoneda, J.Zenihiro, S.-G.Zhou, W.Zuo, T.Uesaka

Quasifree Neutron Knockout Reaction Reveals a Small s-Orbital Component in the Borromean Nucleus 17B

NUCLEAR REACTIONS 1H(17B, np)16B, E ∼ 277 MeV/nucleon; measured reaction products, Eγ, Iγ. 17B; deduced energy levels, partial σ and spectroscopic parameters, resonance widths. Comparison with GSM, VS-IMSRG, AMD, SM calculations. MINOS target, RIKEN Nishina Center.

doi: 10.1103/PhysRevLett.126.082501
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Data from this article have been entered in the EXFOR database. For more information, access X4 datasetE2689.


2021ZH31      Eur.Phys.J. A 57, 157 (2021)

Q.Zhao, Y.Suzuki, J.He, B.Zhou, M.Kimura

α clustering and neutron-skin thickness of carbon isotopes

NUCLEAR STRUCTURE 10,12,14Be, 12,14,16,18C; analyzed available data; calculated point proton and neutron density distributions of the ground states, α spectroscopic factors as function of the neutron skin thickness.

doi: 10.1140/epja/s10050-021-00465-0
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2020BA40      Phys.Rev. C 102, 024317 (2020)

T.Baba, M.Kimura

Monopole and dipole transitions of the cluster states of 18O

NUCLEAR STRUCTURE 18O; calculated levels, J, π, density distributions of the intrinsic states, α spectroscopic factors, reduced matrix for the E0 and IS0 transitions between 0+ states, E1, and IS1 transitions between 0+ and 1- states. Antisymmetrized molecular-dynamics (AMD) calculations for (14C+α) cluster structure of the 0+ and 1- states in 18O. Comparison with experimental data.

doi: 10.1103/PhysRevC.102.024317
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2020CH06      Phys.Rev. C 101, 024317 (2020)

Y.Chiba, M.Kimura

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
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2020CH34      Phys.Rev. C 102, 034619 (2020)

V.Choudhary, W.Horiuchi, M.Kimura, R.Chatterjee

Imprint of a nuclear bubble in nucleon-nucleus diffraction

NUCLEAR REACTIONS 22O, 24Ne, 26Mg, 28Si, 30S, 32Ar, 34Ca(p, p), E=325, 550, 800 MeV; calculated reaction probabilities, σ(θ, E) for various bubble parameters using Glauber model. 22O, 24Ne, 26Mg, 28Si, 30S, 32Ar, 34Ca, 34Si; calculated density distributions, rms matter radii, quadrupole deformation parameters β and γ, bubble parameters, neutron and proton occupation probabilities using antisymmetrized molecular dynamics (AMD); deduced prominent bubble structure of 22O.

doi: 10.1103/PhysRevC.102.034619
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2020KI12      Phys.Rev. C 102, 024325 (2020)

M.Kimura, Y.Taniguchi

α + 28Si and 16O + 16O molecular states and their isoscalar monopole strengths

NUCLEAR REACTIONS 28Si(α, α)32S*,16O(16O, 16O)32S*, E=threshold; calculated energy curves of the positive-parity states before and after the angular momentum projection, energy curves as function of quadrupole deformation parameter β2, intrinsic densities corresponding to the ground and superdeformed minima on the energy surface, 0+ molecular states from analysis of cluster spectroscopic factors, their excitation energies and isoscalar monopole transition matrices and strengths, reduced width amplitudes for 0+ states, molecular rotational bands and B(E2) up to 8+. Extended framework of antisymmetrized molecular dynamics (AMD). Comparison with available experimental data.

doi: 10.1103/PhysRevC.102.024325
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2020LI14      Phys.Rev.Lett. 124, 192501 (2020)

Y.Liu, Y.L.Ye, J.L.Lou, X.F.Yang, T.Baba, M.Kimura, B.Yang, Z.H.Li, Q.T.Li, J.Y.Xu, Y.C.Ge, H.Hua, J.S.Wang, Y.Y.Yang, P.Ma, Z.Bai, Q.Hu, W.Liu, K.Ma, L.C.Tao, Y.Jiang, L.Y.Hu, H.L.Zang, J.Feng, H.Y.Wu, J.X.Han, S.W.Bai, G.Li, H.Z.Yu, S.W.Huang, Z.Q.Chen, X.H.Sun, J.J.Li, Z.W.Tan, Z.H.Gao, F.F.Duan, J.H.Tan, S.Q.Sun, Y.S.Song

Positive-Parity Linear-Chain Molecular Band in 16C

NUCLEAR REACTIONS 2H(16C, X)2H, E=23.5 MeV/nucleon; measured reaction products, Eα, Iα. 16C; deduced excitation energies, spin parities, total decay widths of the resonances in 16C. Comparison with AMD calculations.

doi: 10.1103/PhysRevLett.124.192501
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Data from this article have been entered in the XUNDL database. For more information, click here.


2020MA15      Phys.Rev. C 101, 041303 (2020)

H.Masui, W.Horiuchi, M.Kimura

Two-neutron halo structure of 31F and a novel pairing antihalo effect

NUCLEAR STRUCTURE 31F; calculated S(2n), rms matter radius, valence neutron occupation number of the p3/2 and f7/2 orbits, and radial density distribution using cluster orbital shell model; discussed two-neutron-halo structure, binding mechanism, and the novel antihalo effect.

NUCLEAR REACTIONS 1H, 12C(31F, X), (29F, X), E=240, 900 MeV/nucleon; calculated total σ(E) using Glauber theory, and compared with available experimental data.

doi: 10.1103/PhysRevC.101.041303
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2020NI05      Phys.Rev. C 102, 054327 (2020)

H.Nishibata, K.Tajiri, T.Shimoda, A.Odahara, S.Morimoto, S.Kanaya, A.Yagi, H.Kanaoka, M.R.Pearson, C.D.P.Levy, M.Kimura, N.Tsunoda, T.Otsuka

Structure of the neutron-rich nucleus 30Mg

RADIOACTIVITY 30Na(β-), (β-n), (β-2n)[nuclear-spin-polarized radioactive beam of 28-keV 30Na from U(p, X), E=500 MeV at TRIUMF cyclotron]; measured Eγ, Iγ, γγ and βγ-coin, γγ(θ), β(θ) from spin-polarized 30Na source, isomer half-life by centroid shift of βγ(t) spectrum using eight sets of detector telescopes consisting of a coaxial high-purity Ge detector (HPGe) and thin plastic scintillator at ISAC-TRIUMF facility. 30Mg; deduced levels, J, π, bands, M1 scissors mode, multipolarities, asymmetry parameters for β transitions, β feedings, logft. 30Na; deduce J, π of the ground state, %β-n or Pn and %β-2n or P2n. Comparison with CHFB + LQRPA, AMD + GCM, and large-scale shell model with the EEdf1 interaction, and with previous experimental data.

COMPILATION 30Mg; compiled levels, J, π from literature, and evaluation in the ENSDF database.

doi: 10.1103/PhysRevC.102.054327
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2020ZH45      Eur.Phys.J. A 56, 298 (2020)

B.Zhou, M.Kimura, Q.Zhao, S.-h.Shin

Microscopic calculations for Be isotopes within real-time evolution method

NUCLEAR STRUCTURE 9,10,12Be; calculated energy levels, J, π within the Real-time Evolution Method (REM).

doi: 10.1140/epja/s10050-020-00306-6
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2019BA06      Phys.Rev. C 99, 021303 (2019)

T.Baba, M.Kimura

Coulomb shift in the mirror pair of 14C and 14O as a signature of the linear-chain structure

NUCLEAR STRUCTURE 14C, 14O; calculated levels, J, π, ground state binding energies, Coulomb energies and shifts, radii, density distributions of intrinsic wave functions, single particle energies, Thomas-Ehrman shift, and α-decay widths of linear chain states using antisymmetrized molecular dynamics (AMD). Linear chain structures.

doi: 10.1103/PhysRevC.99.021303
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2019BA51      Phys.Rev. C 100, 064311 (2019)

T.Baba, M.Kimura

Variety of clustering in 18O

NUCLEAR STRUCTURE 18O; calculated levels, J, π, cluster and band structures, density distribution contours of intrinsic positive- and negative-parity states, α-decay widths, spectroscopic factors for α and 6He channels, energy versus quadrupole deformation using the antisymmetrized molecular dynamics (AMD) method; deduced five different types of cluster states for 0+ state: 14C+α, higher-nodal 14C+α, two-molecular states (12C+α+2n), and a 4α linear-chain, dominance of α-particle emission for the 14C+α cluster states and 6He emission for the molecular states. Comparison with available experimental data, and with previous theoretical calculations.

doi: 10.1103/PhysRevC.100.064311
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2019IM01      Phys.Rev. C 99, 064327 (2019)

R.Imai, T.Tada, M.Kimura

Real-time evolution method and its application to the 3α cluster system

NUCLEAR STRUCTURE 12C; calculated levels, J, π intrinsic wave function densities, rms radii, and electric monopole (E0) and isoscalar dipole (E1) transition matrix elements to excited 0+ and 1- states using real-time evolution method (REM), where the equation of motion of the Gaussian wave packets is used to generate basis wave functions, with various cluster configurations. Comparison with experimental data, and with other theoretical model predictions.

doi: 10.1103/PhysRevC.99.064327
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2019NI04      Phys.Rev. C 99, 024322 (2019)

H.Nishibata, S.Kanaya, T.Shimoda, A.Odahara, S.Morimoto, A.Yagi, H.Kanaoka, M.R.Pearson, C.D.P.Levy, M.Kimura, N.Tsunoda, T.Otsuka

Structure of 31Mg: Shape coexistence revealed by β-ψ spectroscopy with spin-polarized 31Na

RADIOACTIVITY 31Na(β-), (β-n)[from 238U(p, X), E=500 MeV, followed by high-resolution mass separation and spin-polarization of 31Na beam at ISAC-I-TRIUMF facility]; measured β spectra, polarization asymmetry of β particles emitted by the decay of 31Na, Eβ, Iβ, Eγ, Iγ, βγ(θ), γ(polarization), βγ- and γγ-coin, half-life of the 50-keV level in 31Mg by βγ(t) using thin plastic scintillators for β- detection and Ge detectors for γ detection at TRIUMF. 31Mg; deduced levels, J, π, %β-n and %β-2n, deformed rotational bands with Kπ=1/2+ and 1/2-. 31Mg(β-)[from 31Na β- decay]; observed γ rays. Comparison with previous experimental data, and with theoretical calculations. Systematics of energies of the lowest 1/2+, 3/2+, 3/2-, and 7/2- levels in 31Mg, 33Si, 35S, 37Ar, 39Ca.

NUCLEAR STRUCTURE 31Mg; calculated levels, J, π using antisymmetrized molecular dynamics (AMD) plus generator coordinate method (GCM), and shell model with the EEdf1 interaction, microscopically derived from chiral effective field theory. Comparison with experimental data.

COMPILATION 31Mg; compiled and discussed experimental and evaluated data for levels, J, π from 1984 to 2013.

doi: 10.1103/PhysRevC.99.024322
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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
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2019ZH24      Phys.Rev. C 99, 051303 (2019)

B.Zhou, Y.Funaki, H.Horiuchi, M.Kimura, Z.Ren, G.Ropke, P.Schuck, A.Tohsaki, C.Xu, T.Yamada

Nonlocalized motion in a two-dimensional container of α particles in 3- and 4- states of 12C

NUCLEAR STRUCTURE 12C; calculated level energies, Tohsaki-Horiuchi-Schuck-Ropke (THSR) wave functions, energy curves and contours, and density profiles of the first 3- and 4- states in 12C using container model. Comparison with generator coordinate method (GCM).

doi: 10.1103/PhysRevC.99.051303
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2018BA20      Phys.Rev. C 97, 054315 (2018)

T.Baba, M.Kimura

Characteristic α and 6He decays of linear-chain structures in 16C

NUCLEAR STRUCTURE 16C; calculated angular-momentum-projected energy surface contours in (β, γ) plane for 0+ and 1- states, density distributions, valence neutron orbits, levels, J, π, B(E2), α-decay and 6He-decay reduced widths of linear-chain states, α-cluster and neutron spectroscopic factors, in-band B(E2) strengths for low-spin states in the ground, triangular, and linear-chain bands. Antisymmetrized molecular dynamics (AMD) calculations. Comparison with available experimental data.

doi: 10.1103/PhysRevC.97.054315
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2018ZH53      Phys.Rev. C 98, 054323 (2018)

B.Zhou, M.Kimura

2α + T cluster structure in 11B

NUCLEAR STRUCTURE 11B; calculated levels, rms matter radii of the 3/2- states, isoscalar monopole transition strengths, B(E2) strengths, contours of squared overlaps for the positive- and negative-parity 1/2, 3/2, and 5/2 states, isoscalar dipole transition strengths using 2α+t cluster structure and the microscopic generator coordinate method (GCM) with the Brink cluster wave functions. Comparison with experimental data, and with other theoretical predictions.

doi: 10.1103/PhysRevC.98.054323
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2017BA14      Phys.Rev. C 95, 064318 (2017)

T.Baba, M.Kimura

Three-body decay of linear-chain states in 14C

NUCLEAR STRUCTURE 14C; calculated energies, Γα, Γ(6He), Γ(10Be) and Γ(6He+8Be) for levels in 14C up to 8+, and decays to 0+, 2+, 1- and 2- states in 10Be, and comparison with the observed resonances in α+10Be resonant scattering data, proton density distribution of the linear-chain configurations; deduced π- and σ-bond linear-chain formations in 14C. 8Be; calculated density distribution. 10Be; calculated positive- and negative-parity states and proton density distributions. Antisymmetrized molecular dynamics (AMD) calculations.

doi: 10.1103/PhysRevC.95.064318
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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
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2017KI03      Phys.Rev. C 95, 034331 (2017)

M.Kimura

Structure and decay of the pygmy dipole resonance in 26Ne

NUCLEAR STRUCTURE 24,25,26Ne; calculated low-energy levels, J, π, B(E2), energy curves as functions of quadrupole deformation parameter β. 26Ne; calculated intrinsic density distributions at energy minima of positive- and negative-parity states, electric dipole strength functions, energy weighted sum and centroid energy of GDR, isoscalar (IS) dipole strength distribution, single-particle spectroscopic factors and B(E1) for 1- pygmy dipole resonances (PDR). Antisymmetrized molecular dynamics (AMD) and its extended version shifted-basis AMD. Comparison with available experimental data.

doi: 10.1103/PhysRevC.95.034331
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2017MO26      Phys.Rev. C 96, 034328 (2017)

S.Momiyama, P.Doornenbal, H.Scheit, S.Takeuchi, M.Niikura, N.Aoi, K.Li, M.Matsushita, D.Steppenbeck, H.Wang, H.Baba, E.Ideguchi, M.Kimura, N.Kobayashi, Y.Kondo, J.Lee, S.Michimasa, T.Motobayashi, N.Shimizu, M.Takechi, Y.Togano, Y.Utsuno, K.Yoneda, H.Sakurai

In-beam γ-ray spectroscopy of 35Mg via knockout reactions at intermediate energies

NUCLEAR REACTIONS C(36Mg, 35Mg), E=235 MeV; C(37Al, 35Mg), E=246 MeV, [secondary 36Mg and 37Al beams from 9Be(48Ca, X), E=345 MeV/nucleon primary reaction, followed by separation using BigRIPS separator and Zero Degree spectrometer at RIBF-RIKEN facility]; measured reaction products, Eγ, Iγ, (35Mg)γ-coin, inclusive and γ-ray cross sections, parallel momentum distributions using DALI2 array of 186 large-volume NaI(Tl) crystals. 35Mg; deduced levels, J, π. Comparison with shell-model calculations using SDPF-M interaction, and with antisymmetrized molecular dynamics (AMD) model calculations using Gogny D1S force. C(36Mg, 34Mg), (36Mg, 33Mg), E=235 MeV; measured inclusive σ.

NUCLEAR STRUCTURE 35Mg; calculated levels, J, π, single-particle knockout cross sections, spectroscopic factors using shell-model with SDPF-M interaction, and antisymmetrized molecular dynamics (AMD) model with Gogny D1S force. Comparison with experimental data.

doi: 10.1103/PhysRevC.96.034328
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2017NI02      Phys.Lett. B 767, 81 (2017)

H.Nishibata, T.Shimoda, A.Odahara, S.Morimoto, S.Kanaya, A.Yagi, H.Kanaoka, M.R.Pearson, C.D.P.Levy, M.Kimura

Shape coexistence in the N = 19 neutron-rich nucleus 31Mg explored by β-γ spectroscopy of spin-polarized 31Na

RADIOACTIVITY 31Na(β-) [from U(p, X)31Na, E=500 MeV]; measured decay products, Eγ, Iγ; deduced level energies, J, π, branching ratios, rotational bands. Comparison with antisymmetrized molecular dynamics (AMD) plus generator coordinate method (GCM) calculations.

doi: 10.1016/j.physletb.2017.01.049
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2016BA53      Phys.Rev. C 94, 044303 (2016)

T.Baba, M.Kimura

Structure and decay pattern of the linear-chain state in 14C

NUCLEAR STRUCTURE 14C; calculated angular-momentum projected energy surface contours in (β, γ) plane for 0+ and 1- states, positive-parity energy levels up to 10+ belonging to ground band, Kπ=0+ and 2+ triangular band, π-bond linear chain band, and σ-bond linear chain band, proton and neutron rms radii, B(E2) for positive- and negative-parity states, cluster states, α-decay reduced widths. Antisymmetrized molecular dynamics (AMD) calculations. Comparison with available experimental data.

doi: 10.1103/PhysRevC.94.044303
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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
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2016KA37      Phys.Rev.Lett. 117, 102501 (2016)

R.Kanungo, W.Horiuchi, G.Hagen, G.R.Jansen, P.Navratil, F.Ameil, J.Atkinson, Y.Ayyad, D.Cortina-Gil, I.Dillmann, A.Estrade, A.Evdokimov, F.Farinon, H.Geissel, G.Guastalla, R.Janik, M.Kimura, R.Knobel, J.Kurcewicz, Yu.A.Litvinov, M.Marta, M.Mostazo, I.Mukha, C.Nociforo, H.J.Ong, S.Pietri, A.Prochazka, C.Scheidenberger, B.Sitar, P.Strmen, Y.Suzuki, M.Takechi, J.Tanaka, I.Tanihata, S.Terashima, J.Vargas, H.Weick, J.S.Winfield

Proton Distribution Radii of 12-19C Illuminate Features of Neutron Halos

NUCLEAR REACTIONS Be(20Ne, X), (40Ar, X)12C/13C/14C/15/16C/17C/18C/19C, E=1 GeV/nucleon; measured reaction products; deduced σ, root-mean-square proton and matter radii, neutron skin thickness. Comparison with ab initio calculations.

doi: 10.1103/PhysRevLett.117.102501
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2016KI19      Eur.Phys.J. A 52, 373 (2016)

M.Kimura, T.Suhara, Y.Kanada-Enyo

Antisymmetrized molecular dynamics studies for exotic clustering phenomena in neutron-rich nuclei

NUCLEAR STRUCTURE 20,22,24,26,28,30,32,34Ne, 24,26,28,30,32,34,36,38,40Mg; calculated 2+1 state energy, B(E2) 20,26,32Ne; calculated proton density distribution, charge radius. 10,11,12Be; calculated levels, J, π. AMD (Antisymmetrized Molecular Dynamics). Compared with data.

doi: 10.1140/epja/i2016-16373-9
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2016LE21      Prog.Theor.Exp.Phys. 2016, 083D01 (2016)

J.Lee, H.Liu, P.Doornenbal, M.Kimura, K.Minomo, K.Ogata, Y.Utsuno, N.Aoi, K.Li, M.Matsushita, H.Scheit, D.Steppenbeck, S.Takeuchi, H.Wang, H.Baba, E.Ideguchi, N.Kobayashi, Y.Kondo, S.Michimasa, T.Motobayashi, H.Sakurai, M.Takechi, Y.Togano

Asymmetry dependence of reduction factors from single-nucleon knockout of 30Ne at ∼ 230 MeV/nucleon

NUCLEAR STRUCTURE 29F, 29,30Ne; calculated structure, energy, spectroscopic factor for proton states in 29F and neutron ones in 29Ne using shell model in sd-pf model space and using AMD (Antisymmetrized Molelcular Dynamics).

NUCLEAR REACTIONS 12C(30Ne, 29F), (30Ne, 29Ne), E≈230 MeV/nucleon; measured 29F, 30Ne residues using ZeroDegree Spectrometer, Eγ, Iγ using detector array DALI2 of 186 NaI(Tl) scintillators; calculated inclusive deeply-bound one-nucleon knock-out σ using eikonal theory with wave functions, densities, spectroscopic factors from shell model and from AMD; deduced σ dependence on separation energy asymmetry and on nuclear radius parameter. Compared with data.

doi: 10.1093/ptep/ptw096
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2015CH36      Phys.Rev. C 91, 061302 (2015)

Y.Chiba, M.Kimura

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
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2015EB01      Phys.Rev. C 91, 014309 (2015)

S.Ebata, M.Kimura

Low-lying 2+ states generated by pn-quadrupole correlation and N = 28 shell quenching

NUCLEAR STRUCTURE 48Ca, 46Ar, 44S, 42Si; calculated quadrupole vibrational strength functions S(E:Q20) in the isovector and isoscalar channels, and in neutron and proton channels, B(E2), single-particle levels. Canonical-basis time-dependent Hartree-Fock-Bogoliubov theory (Cb-TDHFB) with several energy density functionals, including nuclear pairing correlation.

doi: 10.1103/PhysRevC.91.014309
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2015HO01      Phys.Rev. C 91, 014314 (2015)

H.Homma, M.Isaka, M.Kimura

Parity reversal of 12ΛBe

NUCLEAR STRUCTURE 11,12Be; calculated levels, J, π, matter and proton density distributions, binding and excitation energies, matter quadrupole deformation β, and root-mean-square radii for the bandhead states in 11Be and hypernucleus 12Be. Calculations used extended version of antisymmetrized molecular dynamics (AMD) for hypernuclei. Comparison with available experimental results.

doi: 10.1103/PhysRevC.91.014314
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2015IS10      Prog.Theor.Exp.Phys. 2015, 103D02 (2015)

M.Isaka, M.Kimura, E.Hiyama, H.Sagawa

Superdeformation of Ar hypernuclei

NUCLEAR STRUCTURE 37,39,41Ar; calculated separation energies of the ground and superdeformed (SD) states in hypernuclei. Framework of antisymmetrized molecular dynamics (AMD).

doi: 10.1093/ptep/ptv138
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2015IS11      Phys.Rev. C 92, 044326 (2015)

M.Isaka, M.Kimura

Impurity effects of the Λ particle on the 2α cluster states of 9Be and 10Be

NUCLEAR STRUCTURE 9,10,11Be; calculated levels, J, π, matter quadrupole deformation, nuclear and proton density distributions, proton, neutron and matter rms radii, binding energies, B(E2), 2α cluster structures for 9,10Be normal nuclei and 10,11Be hypernuclei. Antisymmetrized molecular dynamics for hypernuclei (HyperAMD model). Comparison with available experimental data.

doi: 10.1103/PhysRevC.92.044326
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2015TA29      Sci. Rep. 5, 10977 (2015)

T.Tachibana, Z.Jurek, H.Fukuzawa, K.Motomura, K.Nagaya, S.Wada, P.Johnsson, M.Siano, S.Mondal, Y.Ito, M.Kimura, T.Sakai, K.Matsunami, H.Hayashita, J.Kajikawa, X.-J.Liu, E.Robert, C.Miron, R.Feifel, J.P.Marangos, K.Tono, Y.Inubushi, M.Yabashi, S.-K.Son, B.Ziaja, M.Yao, R.Santra, K.Ueda

Nanoplasma Formation by High Intensity Hard X-rays

NUCLEAR REACTIONS Ar(γ, X), E ∼ 5 keV; measured reaction products, X-rays; deduced electron yields, volume integrated theoretical electron spectrum of x-ray. Comparison with theoretical calculations. The SPring-8 Angstrom Compact free electron LAser (SACLA) facility in Japan.

doi: 10.1038/srep10977
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2014BA61      Phys.Rev. C 90, 064319 (2014)

T.Baba, Y.Chiba, M.Kimura

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
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2014CH23      Phys.Rev. C 89, 054313 (2014)

Y.Chiba, M.Kimura

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
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2014ES07      Phys.Rev.Lett. 113, 132501 (2014)

A.Estrade, R.Kanungo, W.Horiuchi, F.Ameil, J.Atkinson, Y.Ayyad, D.Cortina-Gil, I.Dillmann, A.Evdokimov, F.Farinon, H.Geissel, G.Guastalla, R.Janik, M.Kimura, R.Knobel, J.Kurcewicz, Yu.A.Litvinov, M.Marta, M.Mostazo, I.Mukha, C.Nociforo, H.J.Ong, S.Pietri, A.Prochazka, C.Scheidenberger, B.Sitar, P.Strmen, Y.Suzuki, M.Takechi, J.Tanaka, I.Tanihata, S.Terashima, J.Vargas, H.Weick, J.S.Winfield

Proton Radii of 12-17B Define a Thick Neutron Surface in 17B

NUCLEAR REACTIONS C(10B, X), (11B, X), (12B, X), (13B, X), (14B, X), (15B, X), (16B, X), (17B, X), E ∼ 900 MeV/nucleon; measured reaction products. 10,11,12,13,14,15,16,17B; deduced charge-changing σ, proton and matter radii, neutron skin. Glauber model analysis.

doi: 10.1103/PhysRevLett.113.132501
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2014IS02      Phys.Rev. C 89, 024310 (2014)

M.Isaka, K.Fukukawa, M.Kimura, E.Hiyama, H.Sagawa, Y.Yamamoto

Superdeformed Λ hypernuclei with antisymmetrized molecular dynamics

NUCLEAR STRUCTURE 41Ca, 46,48Sc; calculated levels, J, π, deformation parameters, B(E2), Λ-N interaction strength, Λ-separation, rms radii, intrinsic density distributions, normal and superdeformed bands, electric quadrupole moments for hypernuclei. 40Ca, 45,47Sc; calculated levels, J, π, normal and superdeformed bands, intrinsic density distributions. Deformed basis antisymmetrized molecular dynamics (AMD) model with the generator coordinate method (GCM). Comparison with experimental data.

doi: 10.1103/PhysRevC.89.024310
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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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2014TE06      Prog.Theor.Exp.Phys. 2014, 101D02 (2014)

S.Terashima, I.Tanihata, R.Kanungo, A.Estrade, W.Horiuchi, F.Ameil, J.Atkinson, Y.Ayyad, D.Cortina-Gil, I.Dillmann, A.Evdokimov, F.Farinon, H.Geissel, G.Guastalla, R.Janik, M.Kimura, R.Knoebel, J.Kurcewicz, Yu.A.Litvinov, M.Marta, M.Mostazo, I.Mukha, T.Neff, C.Nociforo, H.J.Ong, S.Pietri, A.Prochazka, C.Scheidenberger, B.Sitar, Y.Suzuki, M.Takechi, J.Tanaka, J.Vargas, J.S.Winfield, H.Weick

Proton radius of 14Be from measurement of charge-changing cross sections

NUCLEAR REACTIONS C(7Be, np), (9Be, np), (10Be, np), (11Be, np), (12Be, np), (14Be, np), E=90 MeV/nucleon; measured reaction products; deduced σ, proton and nucleon rms radii. Comparison with Glauber model calculations.

doi: 10.1093/ptep/ptu134
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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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2013IS03      Phys.Rev. C 87, 021304 (2013)

M.Isaka, M.Kimura, A.Dote, A.Ohnishi

Splitting of the p orbit in triaxially deformed Λ25MG

NUCLEAR STRUCTURE 25Mg; calculated levels, J, π, rotational bands, single-particle energy contours in β-γ plane, Intraband B(E2) for hypernucleus relative to 24Mg nucleus. Hyper-antisymmetrized molecular dynamics calculations.

doi: 10.1103/PhysRevC.87.021304
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2013IS11      Nucl.Phys. A914, 189c (2013)

M.Isaka, M.Kimura, A.Dote, A.Ohnishi

Excited states with Λ hyperon in p-orbit in 25ΛMg

NUCLEAR STRUCTURE 25Mg; calculated Λ hypernucleus levels, J, π, bands, deformation using antisymmetrized molecular dynamics.

doi: 10.1016/j.nuclphysa.2013.01.027
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2013KI01      Phys.Rev. C 87, 011301 (2013)

M.Kimura, Y.Taniguchi, Y.Kanada-Enyo, H.Horiuchi, K.Ikeda

Prolate, oblate, and triaxial shape coexistence, and the lost magicity of N=28 in 43S

NUCLEAR STRUCTURE 43S; calculated levels, J, π, deformation parameters, B(E2), B(M1), neutron single-particle energies, magnetic-dipole moment, electric quadrupole moment, negative-parity energy surface contours in β-γ plane using triaxial and axial generator coordinate methods (GCM). 47Ca; calculated levels, J, π, Antisymmetrized molecular dynamics (AMD). Coexistence of prolate-deformed, triaxially deformed, and oblate-deformed states, quenching of N=28 shell gap. Comparison with experimental data.

doi: 10.1103/PhysRevC.87.011301
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2012IS02      Phys.Rev. C 85, 034303 (2012)

M.Isaka, H.Homma, M.Kimura, A.Dote, A.Ohnishi

Modification of triaxial deformation and change of spectrum in Λ 25Mg caused by the Λ hyperon

NUCLEAR STRUCTURE 25Mg; calculated levels, J, π, bands, density distribution, and β-γ surface contours, deformation parameters, B(E2) values of hypernucleus. Antisymmetrized molecular dynamics for hypernucleus (HyperAMD) and Generator coordinate method (GCM). 24Mg; calculated levels, J, π, bands, density distribution, and β-γ surface contours, deformation parameters, B(E2) values. Antisymmetrized molecular dynamics, and Generator coordinate method (GCM). Comparison with experimental data.

doi: 10.1103/PhysRevC.85.034303
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2012KI05      Prog.Theor.Phys.(Kyoto) 127, 287 (2012)

M.Kimura, R.Yoshida, M.Isaka

Excitation and Structure Change of 24Mg. I - Triaxial Deformed Mean Field in Low-Lying States -

NUCLEAR STRUCTURE 24Mg; calculated level energies, J, π, γ-deformation, bands. Antisymmetrized molecular dynamics with Cogny effective interaction.

doi: 10.1143/PTP.127.287
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2012KI17      Prog.Theor.Phys.(Kyoto), Suppl. 196, 176 (2012)

M.Kimura, N.Furutachi, Y.Taniguchi, Y.Kanada-Enyo, H.Horiuchi

Clustering Aspects of Highly Excited States and Neutron-Rich Nuclei

NUCLEAR STRUCTURE 24,31Mg, 31Ne, 21F; calculated energy levels, J, π, energy surfaces, B(E2). Comparison with available data.

doi: 10.1143/PTPS.196.176
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2012MI01      Phys.Rev.Lett. 108, 052503 (2012)

K.Minomo, T.Sumi, M.Kimura, K.Ogata, Y.R.Shimizu, M.Yahiro

Determination of the Structure of 31Ne by a Fully Microscopic Framework

NUCLEAR REACTIONS 12C(28Ne, 28Ne'), (29Ne, 29Ne'), (30Ne, 30Ne'), (31Ne, 31Ne'), (32Ne, 32Ne'), E=240 MeV/nucleon; analyzed reaction σ. 28,29,30,31,32Ne; calculated deformed projectile density. Comparison with experimental data.

NUCLEAR STRUCTURE 28,29,30,31,32Ne; calculated J, π, deformation, neutron separation energy, ground state properties and halo structures. Comparison with experimental data.

doi: 10.1103/PhysRevLett.108.052503
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2012MI22      Prog.Theor.Phys.(Kyoto), Suppl. 196, 358 (2012)

K.Minomo, S.Watanabe, T.Sumi, M.Kimura, K.Ogata, Y.R.Shimizu, M.Yahiro

Deformation Effect on Total Reaction Cross Sections for Neutron-Rich Ne-Isotopes

NUCLEAR REACTIONS 12C(28Ne, 28Ne'), (29Ne, 29Ne'), (30Ne, 30Ne'), (31Ne, 31Ne'), (32Ne, 32Ne'), E=240 MeV/nucleon; analyzed available data. 28,29,30,31,32Ne; deduced σ using antisymmetrized molecular dynamics. Comparison with available data.

doi: 10.1143/PTPS.196.358
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2012SU09      Phys.Rev. C 85, 064613 (2012)

T.Sumi, K.Minomo, S.Tagami, M.Kimura, T.Matsumoto, K.Ogata, Y.R.Shimizu, M.Yahiro

Deformation of Ne isotopes in the region of the island of inversion

NUCLEAR REACTIONS 12C(28Ne, 28Ne), (29Ne, 29Ne), (30Ne, 30Ne), (31Ne, 31Ne), (32Ne, 32Ne), E=240 MeV/nucleon; calculated σ. 12C(12C, 12C), E=74.25, 135 MeV/nucleon; calculated σ(E, θ). Double folding model with Melbourne g-matrix interaction and the nuclear densities calculated by antisymmetrized molecular dynamics (AMD). Effects of pairing correlation. Comparison with experimental data.

NUCLEAR STRUCTURE 20,21,22,23,24,25,26,27,28,29,30,31,32Ne; calculated ground state J, π, deformation parameters β2, β4 and γ, S(n), total binding energy, matter rms radii, neutron and proton rms radii and density profiles, pairing effects on total binding energy. AMD, spherical Gogny-HF and -HFB calculations. 31Ne; halo nucleus.

doi: 10.1103/PhysRevC.85.064613
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2011FU01      Phys.Rev. C 83, 021303 (2011)

N.Furutachi, M.Kimura

Bent three-α linear-chain structure of 13C

NUCLEAR STRUCTURE 13C; calculated levels, J, π, rotational bands, GCM wave functions and wave functions on the energy surfaces, density distributions, and molecular orbits using 3α+n cluster model. Stability against the bending motion of three-a clusters. Comparison with 0+ states in 12C. Comparison with experimental data for 13C.

doi: 10.1103/PhysRevC.83.021303
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2011IS02      Phys.Rev. C 83, 044323 (2011)

M.Isaka, M.Kimura, A.Dote, A.Ohnishi

Deformation of hypernuclei studied with antisymmetrized molecular dynamics

NUCLEAR STRUCTURE 8,9Be, 12,13C, 19,20,21Ne; calculated energy curves, total energies and binding energies, rms radii as function of β and γ deformation parameters, and density plots for hypernuclei using antisymmetrized molecular dynamics (HyperAMD) for structure of p-sd shell hypernuclei. Possibility of parity inversion in 20Ne hypernucleus.

doi: 10.1103/PhysRevC.83.044323
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2011IS03      Phys.Rev. C 83, 054304 (2011)

M.Isaka, M.Kimura, A.Dote, A.Ohnishi

Shell and cluster states of 21ΛNe studied with antisymmetrized molecular dynamics

NUCLEAR STRUCTURE 21Ne; calculated levels, J, π, K=0+ and 0- bands, B(E2), rms radii, density distributions of hypernucleus. Antisymmetrized molecular dynamics (AMD) for hypernuclei. Comparison with AMD calculations for levels, J, π, bands in 20Ne. Cluster structure.

doi: 10.1103/PhysRevC.83.054304
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2011IS07      Int.J.Mod.Phys. E20, 859 (2011)

M.Isaka, H.Honma, M.Kimura, A.Dote, K.Ohnishi

Impurity effects in 12ΛBe and 21ΛNe hypernuclei

NUCLEAR STRUCTURE 11,12Be, 20,21Ne; calculated energies, J, π , B(E2) for low-lying states in hypernuclei, α+16O cluster bands, rms radii.

doi: 10.1142/S0218301311018848
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2011KI10      Phys.Rev. C 83, 044304 (2011)

M.Kimura, N.Furutachi

Molecule-like structure with covalent neutrons of F isotopes toward the neutron drip line

NUCLEAR STRUCTURE 19,21,23,25,27,29F; calculated levels, J, π, bandheads, density distributions, single particle configurations. Antisymmetrized molecular dynamics for α cluster states. Comparison with experimental data.

doi: 10.1103/PhysRevC.83.044304
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2011KI12      Int.J.Mod.Phys. E20, 893 (2011)

M.Kimura

Systematic study of the many-particle and many-hole states in and around the island of inversion

NUCLEAR STRUCTURE 33,35Al, 32,34Mg, 30,32Ne, 33Mg; calculated single-particle energies and quadrupole deformation, 33Mg low-lying state energies, J, π. AMD calculations, comparison with experimental data.

doi: 10.1142/S0218301311018915
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2011MA10      Phys.Rev. C 83, 024312 (2011)

H.Matsumiya, K.Tsubakihara, M.Kimura, A.Dote, A.Ohnishi

Level structure and production cross section of 12 over Ξ Be studied with coupled-channels antisymmetrized molecular dynamics

NUCLEAR STRUCTURE 11,12C, 11B, 12Be; calculated levels, J, π, rms radii, β and γ deformations, density distributions. Coupled-channel antisymmetrized molecular dynamics. Multistrangeness system. Comparison with experimental data and with shell model predictions.

NUCLEAR REACTIONS 12C(π+, K+)12C, E at 1050 MeV/c; 12C(K-, K+)12Be, E at 1800 MeV/c; calculated spectra, differential cross sections for production of hypernuclei 12C and 12Be, spectroscopic factors. Comparison with experimental data.

doi: 10.1103/PhysRevC.83.024312
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2011MI13      Phys.Rev. C 84, 034602 (2011)

K.Minomo, T.Sumi, M.Kimura, K.Ogata, Y.R.Shimizu, M.Yahiro

Deformation effect on total reaction cross sections for neutron-rich Ne isotopes

NUCLEAR REACTIONS 12C(28Ne, X), (29Ne, X), (30Ne, X), (31Ne, X), (32Ne, X), E=240 MeV/nucleon; analyzed cross sections, and matter rms radii. Double-folding model with the Melbourne g matrix, density of the projectile from the mean-field model with the deformed Woods-Saxon potential, deformation evaluated by antisymmetrized molecular dynamics. Effect of deformation on cross section.

doi: 10.1103/PhysRevC.84.034602
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2011TA13      Int.J.Mod.Phys. E20, 1046 (2011)

Y.Taniguchi, M.Kimura, Y.Kanada-Enyo, H.Horiuchi

Clustering correlations and triaxiality in the sd-shell region

NUCLEAR STRUCTURE 28Si, 40Ca; calculated level scheme, J, π, quadrupole deformation parameter; deduced superdeformed states in 28Si, oblate cluster, triaxiality.

doi: 10.1142/S0218301311019246
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2010KI12      Nucl.Phys. A834, 482c (2010)

M.Kimura, N.Furutachi, Y.Kanada-Enyo

Alpha cluster states and molecular orbitals in sd-shell nuclei

NUCLEAR STRUCTURE 22Ne, 19,21,23,25,27,29F; calculated levels, J, π, rotational bands, matter and neutron densities using α+18O di-nuclei states within AMD. Comparison with data.

doi: 10.1016/j.nuclphysa.2010.01.071
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2010MA24      Nucl.Phys. A833, 1 (2010)

J.A.Maruhn, N.Loebl, N.Itagaki, M.Kimura

Linear-chain structure of three α-clusters in 16C and 20C

NUCLEAR STRUCTURE 16,20C; calculated ground-state binding energies, β2, configurations, related features for chain-like α clusters using Skyrme mean-field model.

doi: 10.1016/j.nuclphysa.2009.12.005
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2010MA71      Nucl.Phys. A835, 366c (2010)

H.Matsumiya, K.Tsubakihara, M.Isaka, M.Kimura, A.Dote, A.Ohnishi

Spin-dependence of the Ξ-N interaction and the Ξ hypernuclear production spectrum

NUCLEAR STRUCTURE 12Be; calculated Ξ hypernucleus levels, J, π using different interactions. 12C; calculated Λ hypernucleus quadrupole deformation energy.

doi: 10.1016/j.nuclphysa.2010.01.220
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2010TA11      Phys.Rev. C 82, 011302 (2010)

Y.Taniguchi, Y.Kanada-Enyo, M.Kimura, K.Ikeda, H.Horiuchi, E.Ideguchi

Triaxial superdeformation in 40Ar

NUCLEAR STRUCTURE 40Ar; calculated levels, J, π, single-particle energies, triaxial superdeformed band, B(E2) using deformed-basis antisymmetrized molecular dynamics. Comparison with experimental data.

doi: 10.1103/PhysRevC.82.011302
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2009FU09      Prog.Theor.Phys.(Kyoto) 122, 865 (2009)

N.Furutachi, M.Kimura, A.Dote, Y.Kanada-Enyo

Structures of Light Halo Nuclei

NUCLEAR STRUCTURE 4,6,8He, 8B, 9C; calculated radii, binding energies, magnetic dipole, electric quadrupole moments; deduced halo structures in 8B, 9C.

doi: 10.1143/PTP.122.865
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2009IT01      Phys.Rev. C 79, 034312 (2009)

N.Itagaki, M.Kimura

Cluster structure stabilized by s2 neutrons in light neutron-rich nuclei

NUCLEAR STRUCTURE 18O, 22Ne; calculated energies of 0+ states. Investigated s2 configuration of two neutrons in middle of nucleus as a characteristic bond of α clusters. Microscopic Nα+2n cluster model calculations.

doi: 10.1103/PhysRevC.79.034312
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2009TA04      Prog.Theor.Phys.(Kyoto) 121, 533 (2009)

Y.Taniguchi, Y.Kanada-Enyo, M.Kimura

Deformations and Clustering Correlations in p- and sd-Shell Nuclei Using the Gogny and Skyrme Interactions

doi: 10.1143/PTP.121.533
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2009TA25      Phys.Rev. C 80, 044316 (2009); Publishers Note, Phys.Rev. C 80, 059903 (2009)

Y.Taniguchi, Y.Kanada Enyo, M.Kimura

Cluster structures and superdeformation in 28Si

NUCLEAR STRUCTURE 28Si; calculated levels, J, π, B(E2), moments of inertia, energies of 12C+16O and 4He+24Mg cluster structures as a function of the distance between the clusters for normal-deformed and superdeformed structures in the framework of deformed basis antisymmetrized molecular dynamics (AMD) and multiconfiguration mixing (MCM).

doi: 10.1103/PhysRevC.80.044316
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2008FU01      Prog.Theor.Phys.(Kyoto) 119, 403 (2008)

N.Furutachi, M.Kimura, A.Dote, Y.Kanada-En'yo, S.Oryu

Cluster Structures in Oxygen Isotopes

NUCLEAR STRUCTURE 16,18,20O; calculated level energies, J, π, B(E2) using the AMD plus GCM method. Cluster Structures.

doi: 10.1143/PTP.119.403
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2008IT01      Phys.Rev. C 77, 037301 (2008)

N.Itagaki, Tz.Kokalova, M.Ito, M.Kimura, W.von Oertzen

Coupling between α-condensed states and normal cluster states

NUCLEAR STRUCTURE 16O, 20Ne; calculated α-condensed states, energy convergence, wave functions using microscopic α-cluster model.

doi: 10.1103/PhysRevC.77.037301
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2008KA24      Nucl.Phys. A805, 392c (2008)

Y.Kanada-Enyo, Y.Taniguchi, M.Kimura

Cluster aspect of light unstable nuclei

NUCLEAR STRUCTURE 8He, 13B; calculated energy levels using antisymmetrized molecular dynamics model. Comparison with data.

doi: 10.1016/j.nuclphysa.2008.02.279
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2008KA36      Prog.Theor.Phys.(Kyoto) 120, 917 (2008)

Y.Kanada-Enyo, Y.Kawanami, Y.Taniguchi, M.Kimura

Cluster States in 13B

NUCLEAR STRUCTURE 13B; calculated levels, J, π, B(E2) using the AMD formalism. Predictions for cluster states with large deformations.

doi: 10.1143/PTP.120.917
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2008KA46      Int.J.Mod.Phys. E17, 2336 (2008)

Y.Kanada-Enyo, M.Kimura, Y.Taniguchi, T.Suhara

Cluster structure of unstable nuclei studied with AMD

NUCLEAR STRUCTURE 11B, 11C, 8He, 14C; calculated three-cluster structures. Antisymmetrized molecular dynamics.

doi: 10.1142/S0218301308011574
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2008MU03      At.Data Nucl.Data Tables 94, 161 (2008)

I.Murakami, J.Yan, H.Sato, M.Kimura, R.K.Janev, T.Kato

Excitation, ionization, and electron capture cross sections for collisions of Li3+ with ground state and excited hydrogen atoms

doi: 10.1016/j.adt.2007.10.002
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2007IT02      Phys.Rev. C 75, 037303 (2007)

N.Itagaki, M.Kimura, C.Kurokawa, M.Ito, W.von Oertzen

α-condensed state with a core nucleus

NUCLEAR STRUCTURE 8,10Be, 12C, 16O, 24Mg, 28Si; calculated α-cluster states energies.

doi: 10.1103/PhysRevC.75.037303
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2007KI05      Phys.Rev. C 75, 034312 (2007)

M.Kimura

Molecular orbitals and α + 18O molecular bands of 22Ne

NUCLEAR STRUCTURE 22Ne; calculated levels, J, π, density distributions, α-cluster configurations.

doi: 10.1103/PhysRevC.75.034312
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2007KI08      Phys.Rev. C 75, 041302 (2007)

M.Kimura

Intruder features of 31Mg and the coexistence of many-particle and many-hole states

NUCLEAR STRUCTURE 31Mg; calculated low-lying level structure using antisymmetrized molecular dynamics plus generator coordinate method with the Gogny D1S force, predicted the coexistence of the normal spherical configuration and strongly deformed intruder configurations at very small excitation energies.

doi: 10.1103/PhysRevC.75.041302
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2007TA21      Nucl.Phys. A787, 547c (2007)

Y.Taniguchi, M.Kimura, Y.Kanada-En'yo, H.Horiuchi

Coexistence of cluster structure and mean-field-type structure in medium-weight nuclei

NUCLEAR STRUCTURE 40Ca; calculated levels, J, π, cluster structure. Antisymmetrized molecular dynamics with generator coordinate method. Comparison with data.

doi: 10.1016/j.nuclphysa.2006.12.083
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2007TA29      Phys.Rev. C 76, 044317 (2007)

Y.Taniguchi, M.Kimura, Y.Kanada-Enyo, H.Horiuchi

Clustering and triaxial deformations of 40Ca

NUCLEAR STRUCTURE 40Ca; calculated deformation parameters, levels, J, π, moment of inertia, B(E2), clustering, normal and superdeformed bands.

doi: 10.1103/PhysRevC.76.044317
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