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NSR database version of May 22, 2024.

Search: Author = E.Ha

Found 25 matches.

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2022KI10      Phys.Rev. C 105, 034340 (2022)

S.Kim, M.-H.Mun, M.K.Cheoun, E.Ha

Shape coexistence and neutron skin thickness of Pb isotopes by the deformed relativistic Hartree-Bogoliubov theory in continuum

NUCLEAR STRUCTURE 178,180,182,184,186,188,190,192,194,196,198,200,202,204,206,208,210,212,214Pb; calculated neutron pairing gaps. 172,174,176,178,180,182,184,186,188,190,192,194,196,198,200,202,204,206,208,210,212,214,216,218,220,222,224,226,228,230,232,234,236,238,240,242,244,246,248,250,252,254,256,258,260,262,264,266,268,270,272,274,276,278,260,282,284,286,288,290,292,294,296,298,300,302Pb; calculated deformation parameter by the minimum of the total binding energy. 182,184,186,188,208Pb; calculated neutron single-particle energies for various shape coexistence cases - oblate, spherical, prolate. 180,182,184,186,188,190,192,194,196,198,200,202,204,206,208,210,212,214,216,218Pb; calculated total binding energy dependence on the deformation.266,268,278Pb; calculated neutron single-particle states occupation probabilities. 260,262,264,266,268,270,272,274,276,278,260,282,284,286,288,290,292,294,296,298,300,302,304Pb; calculated S(2n), Fermi energies, deformation parameters. 208Pb; calculated proton and netron density distributions. 174,176,178,180,182,184,186,188,190,192,194,196,198,200,202,204,206,208,210,212,214,216,218,220,222,224,226,228,230,232,234,236,238,240,242,244,246,248,250,252,254,256,258,260,262,264,266Pb; calculated proton and neutron radii, neutron skin thickness. Deformed relativistic Hartree-Bogoliubov theory in continuum (DRHBc). Comparison to available experimental data.

doi: 10.1103/PhysRevC.105.034340
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2021HA35      Phys.Rev. C 104, 034306 (2021)

E.Ha, S.Kim, M.-K.Cheoun, H.Sagawa

Isoscalar pairing correlations by the tensor force in the ground states of 12C, 16O, 20Ne, and 32S nuclei

NUCLEAR STRUCTURE 12C, 16O, 20Ne, 32S; analyzed empirical pairing gaps from experimental and theoretical β2 deformation parameters and experimental quadrupole moments; calculated ratio of isovector (IV) and isoscalar (IS) pairing gap to the total neutron-proton pairing, tensor force (TF) effects on pairing matrix elements (PMEs), number of pairs in terms of the effective neutron-proton (T=0) coupling strength. Deformed Bardeen-Cooper-Schrieffer (BCS) model with Brueckner G-matrix derived from the charge-dependent Bonn potential for investigation of role of the tensor force on the pairing correlations in the ground-state structure.

NUCLEAR REACTIONS 12C(12C, X), E=0.250, 1.05, 2.01 GeV; calculated ratios of the neutron-proton knockout to neutron-neutron and proton-proton knockout cross sections. Deformed BCS model with Brueckner G-matrix. Comparison with experimental data.

doi: 10.1103/PhysRevC.104.034306
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2019HA19      Phys.Rev. C 99, 064304 (2019)

E.Ha, M.-K.Cheoun, H.Sagawa

Effects of the Coulomb and the spin-orbit interaction in a deformed mean field on the pairing correlations in N=Z nuclei

NUCLEAR STRUCTURE 24Mg, 36Ar, 48Cr, 64Ge, 108Xe, 128Gd; calculated np-, nn-, pp-pairing gaps, β2 deformation parameters, neutron and proton occupation probabilities, neutron and proton single particle state energies (SPSEs), and ratio of isovector and isoscalar pairing interaction gap to the total np-pairing gap using deformed BCS approach, with and without Coulomb and spin-orbit (SO) interaction. Comparison with experimental data.

doi: 10.1103/PhysRevC.99.064304
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2019HA38      J.Phys.(London) G46, 105109 (2019)

E.Ha, M.-K.Cheoun

Competition of deformation and neutron-proton pairing in Gamow-Teller transitions for 56, 58Ni and 62, 64Ni

NUCLEAR STRUCTURE 56,58,60,62,64Ni; analyzed available data; calculated B(GT), occupation probabilities of neutrons and protons; deduced effects of the np pairing correlations and the deformations.

doi: 10.1088/1361-6471/ab3591
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2019HA41      Acta Phys.Pol. B50, 697 (2019)

E.Ha, M.-K.Cheoun, H.Sagawa

Neutron-Proton Pairing Correlations and Deformation for N=Z Nuclei in sd- and pf-shell by Deformed BCS and Deformed QRPA

NUCLEAR STRUCTURE 24Mg, 72Kr; calculated ground-state energies, neutron and proton single particle state energies (SPSEs). Deformed BCS approach.

NUCLEAR REACTIONS 56Ni(p, n), E not given; calculated B(GT); deducedeffects of the np pairing correlations. Deformed QRPA approach

doi: 10.5506/aphyspolb.50.697
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2018HA09      Phys.Rev. C 97, 024320 (2018)

E.Ha, M.-K.Cheoun, H.Sagawa

Spin singlet and spin triplet pairing correlations on shape evolution in sd-shell N=Z Nuclei

NUCLEAR STRUCTURE 24Mg, 28Si, 32S; calculated energies of single-particle states, ground-state energies, total single-particle energies (TSPEs), np pairing strength, proton and neutron Fermi energies as function of deformation; deduced impact of interplay between the two pairing interactions on determining the deformation of the ground states. Axially symmetric deformed Woods-Saxon (DWS) and deformed BCS (DBCS) calculations, with T=0 and T=1 pairing correlations.

doi: 10.1103/PhysRevC.97.024320
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2018HA23      Phys.Rev. C 97, 064322 (2018)

E.Ha, M.-K.Cheoun, H.Sagawa, W.Y.So

Neutron-proton pairing correlations and deformation for N=Z nuclei in the pf shell within the deformed BCS and Hartree-Fock-Bogoliubov approach

NUCLEAR STRUCTURE 44Ti, 48Cr, 52Fe, 64Ge, 68Se, 72Kr, 76Sr; calculated proton and neutron pairing gaps, Fermi energies of protons and neutrons, energies of single particle states in 44Ti and 64Ge as a function of deformation parameter β2, pairing correlation energies and ground-state energies with and without neutron-proton pairing and three times enhanced T=0 pairing as a function of β2 parameter, neutron occupation probability in 68Se, and strength parameters in 72Kr. Deformed Bardeen-Cooper-Schrieffer (DBCS) and deformed Hartree-Fock-Bogoliubov (DHFB) approach for N=Z nuclei, with deformed Woods-Saxon potential calculations for single-particle states.

doi: 10.1103/PhysRevC.97.064322
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2017HA07      Eur.Phys.J. A 53, 26 (2017)

E.Ha, M.-K.Cheoun

A study of Gamow-Teller transitions for N = Z nuclei, 24Mg, 28Si, and 32S, by a deformed QRPA

NUCLEAR STRUCTURE 24Mg, 28Si, 32S; calculated single-neutron levels, J, π vs deformation, s-d shell β-decay GT transitions strength distribution, B(GT) using DQRPA (Deformed QRPA).

doi: 10.1140/epja/i2017-12216-7
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2016HA35      Phys.Rev. C 94, 054320 (2016)

E.Ha, M.-K.Cheoun

Effects of deformation and neutron-proton pairing on the Gamow-Teller transitions for 24, 26Mg in a deformed quasiparticle random-phase approximation

NUCLEAR STRUCTURE 24,26Mg; calculated total ground state energies, contours of total ground state energies in (β2, β4) plane, neutron single-particle level energies (SPSE) as a function of β2 deformation, occupation amplitudes of protons and neutrons. Deformed Woods-Saxon mean field energy (EMF) and the pairing energy.

NUCLEAR REACTIONS 24,26Mg(3He, t), (t, 3He); calculated Gamow-Teller transition strength distributions, and compared with experimental data. Neutron-proton (np) pairing correlations. Deformed quasiparticle random phase approximation (DQRPA) including deformation at the Bardeen-Cooper-Schrieffer and RPA stage.

doi: 10.1103/PhysRevC.94.054320
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2015HA05      Nucl.Phys. A934, 73 (2015)

E.Ha, M.-K.Cheoun

Gamow-Teller strength distributions in 76Ge, 76, 82Se, and 90, 92Zr by the deformed proton-neutron QRPA

NUCLEAR STRUCTURE 76Ge, 76,82Se, 90,92Zr; calculated deformation, pairing strength parameter, B(GT) transition strength distribution, sum rule vs E* using QRPA with deformed potential.

doi: 10.1016/j.nuclphysa.2014.12.002
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2015HA24      Phys.Rev. C 92, 044315 (2015)

E.Ha, M.-K.Cheoun, F.Simkovic

Brueckner G-matrix approach for neutron-proton pairing correlations in the deformed BCS approach

NUCLEAR STRUCTURE 64,66,68,70,72,74Ge; calculated pairing potential, neutron-proton pairing gap, proton, neutron and neutron-proton pairing strengths, np pairing gaps as a function of deformation parameter β2, occupation probabilities of neutrons and protons. Brueckner G-matrix approach, based on CD-Bonn potential for neutron-proton (np) pairing correlations in the deformed Bardeen-Cooper-Schrieffer (BCS) theory.

doi: 10.1103/PhysRevC.92.044315
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2013CH32      J.Phys.:Conf.Ser. 445, 012020 (2013)

M.-K.Cheoun, E.Ha

High-lying Gamow-Teller excited states in the deformed nuclei, 76Ge, 82Se and N = 20 nuclei in the island of inversion by the Deformed QRPA (DQRPA)

NUCLEAR STRUCTURE 76Ge, 82Se; calculated occupation probabilities of single-particle states vs their energy, B(GT) strength distribution vs different deformations using deformed QRPA. B(GT) compared with measured (p, n) reactions on given targets.

doi: 10.1088/1742-6596/445/1/012020
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2013HA18      Phys.Rev. C 88, 017603 (2013)

E.Ha, M.-K.Cheoun

Shell evolution of N=20 nuclei and Gamow-Teller strengths of 30, 32, 34Mg with deformed quasiparticle random-phase approximation

NUCLEAR STRUCTURE 26,28,30,32,34Mg, 30Ne, 34Si; calculated energies of neutron single-particle states. 30,32,34Mg; calculated deformation parameters β2 from RMF calculations and experimental B(E2) values, pairing gaps, Gamow-Teller strengths B(GT-) as function of excitation energy and deformation. Shell closure breaking at N=20. Deformed quasiparticle random-phase approximation (DQRPA) framework.

doi: 10.1103/PhysRevC.88.017603
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2012CH25      Phys.Rev. C 85, 065807 (2012)

M.-K.Cheoun, E.Ha, T.Hayakawa, S.Chiba, K.Nakamura, T.Kajino, G.J.Mathews

Neutrino induced reactions for ν-process nucleosynthesis of 92Nb and 98Tc

NUCLEAR REACTIONS 92Zr(ν, e)92Nb, 93Nb[ν, ν'n)92Nb, 93Nb(ν-bar, ν-bar'n]92Nb, 98Mo(ν, e)98Tc, 99Ru(ν, ν'p)98Tc, 99Ru(ν-bar, ν-bar'p)98Tc, E<80 MeV; calculated B(GT) strength distributions, energy and temperature dependent σ in charge current (CC) and neutral current (NC) reactions. Quasiparticle random phase approximation calculations. Nucleosynthesis of odd-odd 98Tc and 92Nb nuclei by the ν-process in core-collapse supernovae.

doi: 10.1103/PhysRevC.85.065807
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2012CH42      Eur.Phys.J. A 48, 137 (2012)

M.-K.Cheoun, E.Ha, T.Kajino

High-lying excited states in Gamow Teller strength and their roles in neutrino reactions

NUCLEAR REACTIONS 40Ar(ν, ν'), (ν, e), (ν-bar, e+), E=0-80 MeV; calculated B(GT) strength distribution, σ. Compared with data.

NUCLEAR STRUCTURE 90Zr, 90Nb; calculated B(GT) strength distribution below ≈ 20 MeV using QRPA and pnQRPA.

doi: 10.1140/epja/i2012-12137-y
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2011CH07      Phys.Rev. C 83, 028801 (2011)

M.-K.Cheoun, E.Ha, T.Kajino

Reactions on 40Ar involving solar neutrinos and neutrinos from core-collapsing supernovae

NUCLEAR REACTIONS 40Ar(ν, e+)40Cl, 40Ar(ν, ν'), E=0-80 MeV; calculated σ, G-T strengths for solar neutrinos and neutrinos from core-collapsing supernovae using quasiparticle random phase approximation (QRPA).

doi: 10.1103/PhysRevC.83.028801
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2011HA52      J.Korean Phys.Soc. 59, 1533s (2011)

E.Ha, M.-K.Cheoun

Exotic Nuclear Structure by the Deformed BCS and QRPA

RADIOACTIVITY 26Mg(β-); calculated GT strength distribution using DQRPA (Deformed QRPA) with separable GT residual interaction, deformation and gap parameters. Results consistent with relativistic mean-field and some data.

doi: 10.3938/jkps.59.1533
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2011HA62      J.Phys.:Conf.Ser. 312, 042002 (2011)

E.Ha, M.-K.Cheoun

Gamow-Teller Transitions for Neutron-Rich Nuclei in the Superburst by the Deformed Quasi-particle RPA(DQRPA)

NUCLEAR STRUCTURE 26Mg, 60Ni; calculated deformation parameter β2, pairing, GT matrix elements for β+ decay in neutron stars using DQRPA (deformed QRPA) with Brueckner G-matrix based on Bonn potential.

doi: 10.1088/1742-6596/312/4/042002
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2010CH05      Phys.Rev. C 81, 028501 (2010)

M.-K.Cheoun, E.Ha, S.Y.Lee, K.S.Kim, W.Y.So, T.Kajino

Neutrino reactions on 12C by the quasiparticle random-phase approximation (QRPA)

NUCLEAR REACTIONS 12C(ν, e)12N, E=0-80 MeV; calculated σ using quasiparticle random phase approximation calculations. Comparison with experimental data.

doi: 10.1103/PhysRevC.81.028501
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2010CH40      Phys.Rev. C 82, 035504 (2010)

M.-K.Cheoun, E.Ha, T.Hayakawa, T.Kajino, S.Chiba

Neutrino reactions on 138La and 180Ta via charged and neutral currents by the quasiparticle random-phase approximation

NUCLEAR REACTIONS 139La, 181Ta(ν, ν'), 138Ba(ν, e)138La, 180Hf(ν, e)180Ta, E=0-80 MeV; calculated σ by neutral and charged current reactions using standard quasi-particle random phase approximation (QRPA) with neutron-proton pairing and neutron-neutron and proton-proton pairing correlations. Astrophysical relevance.

RADIOACTIVITY 138Ba, 180Hf(β-); calculated Gamow-Teller strength distribution B(GT) using QRPA.

doi: 10.1103/PhysRevC.82.035504
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2009HA09      Phys.Rev. C 79, 037301 (2009)

E.Ha, S.W.Hong

Rotational energy term in the empirical formula for the yrast energies in even-even nuclei

NUCLEAR STRUCTURE A=2-250; analyzed excitation energies of yrast 2+, 4+, 6+, 8+ and 10+ states in even-even nuclei in rotational-model formalism. Comparisons with experimental data.

doi: 10.1103/PhysRevC.79.037301
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2008KI02      Nucl.Phys. A799, 46 (2008)

D.Kim, E.Ha, D.Cha

Universal expression for the lowest excitation energy of natural parity even multipole states

NUCLEAR STRUCTURE A=2-254; compiled, analyzed lowest excited state energies; deduced parameters of empirical formula.

doi: 10.1016/j.nuclphysa.2007.10.006
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2007HA07      J.Korean Phys.Soc. 50, 1172 (2007)

E.Ha, D.Cha

Empirical Formula for the Excitation Energies of the First 2+ and 3- States in Even-Even Nuclei

NUCLEAR STRUCTURE A=2-254; compiled, analyzed excited states energies; deduced parameters.

doi: 10.3938/jkps.50.1172
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2007HA17      Phys.Rev. C 75, 057304 (2007)

E.Ha, D.Cha

Origin of 2+1 excitation energy dependence on valence nucleon numbers

NUCLEAR STRUCTURE Z=52, 70; N=70, 102; calculated the dependence of the first 2+ state excitation energy in even-even nuclei on valence nucleon numbers.

doi: 10.1103/PhysRevC.75.057304
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2006HA07      J.Korean Phys.Soc. 48, 318 (2006)

E.Ha, D.Cha

The Low-Lying Quadrupole Strength of 30Ne and 32Mg Is Revisited

NUCLEAR STRUCTURE 30Ne, 32Mg, 34Si, 36S, 38Ar; calculated level energies, transitions B(E2). BCS plus RPA method, comparison with data.

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Note: The following list of authors and aliases matches the search parameter E.Ha: , E.J.HA