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NSR database version of April 11, 2024.

Search: Author = M.K.Cheoun

Found 96 matches.

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2024HE03      Phys.Rev. C 109, 024603 (2024)

K.Heo, M.-K.Cheoun, K.-S.Choi, K.S.Kim, W.Y.So

Suppression of the elastic scattering cross section for the 17Ne+208Pb system

doi: 10.1103/PhysRevC.109.024603
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2023HE07      Phys.Rev. C 107, 064608 (2023)

K.Heo, M.-K.Cheoun, K.-S.Choi, K.S.Kim, W.Y.So

Number of virtual photons in the Coulomb dipole excitation

NUCLEAR REACTIONS 208Pb(11Li, 11Li), E=2.8, 28, 70, 280, 2800 MeV/nucleon; 208Pb(11Be, 11Be), (16O, 16O), (40Ca, 40Ca), 28Si, 58Ni, 144Sm, 197Au(11Li, 11Li), E=70 MeV/nucleon; calculated spectrum and number of virtual photons. 208Pb(19B, 19B), E=220 MeV/nucleon; calculated Coulomb dipole strength distribution. Calculations with general, relativistic, nonrelativistic, and intermediate methods. Comparison to other theoretical calculations and available experimental data.

doi: 10.1103/PhysRevC.107.064608
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2023HW01      Astrophys.J. 955, 79 (2023)

E.Hwang, H.Ko, K.Heo, M.-K.Cheoun, D.Jang

Reinvestigating the Gamow Factor of Reactions on Light Nuclei

NUCLEAR REACTIONS 2,3H, 3He(d, X), 2H, 6,7Li(p, X), E<100 MeV; calculated penetration probabilities (PP); deduced PP higher than those predicted by the conventional form near the Coulomb barrier, reduction of the Gamow peak energy.

doi: 10.3847/1538-4357/acea80
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2023KI05      Phys.Rev. C 107, 024607 (2023)

K.S.Kim, S.Choi, T.Miyatsu, M.-K.Cheoun, H.Kim, W.Y.So

Quasielastic charged-current neutrino-nucleus scattering with relativistic nuclear models

NUCLEAR REACTIONS 12C, 40Ar(ν, μ-), (ν-bar, μ+), E< GeV; calculated total σ, differential σ in term of energy loss, double differential σ in terms of the kinetic energy and polar angle of outgoing muon. Calculations with quantum hadrodynamics (QHD), the nonlinear σ (NL), the quark-meson coupling (QMC) and the chiral quark-meson coupling (QCMC) models. Comparison with experimental data from MiniBooNE, T2K, MicroBooNE and SciBooNE.

doi: 10.1103/PhysRevC.107.024607
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2023KI09      Phys.Rev. C 107, 065202 (2023)

S.-H.Kim, J.K.Ahn, S.H.Kim, S.-i.Nam, M.-K.Cheoun

Double-strangeness exchange reactions in a hybrid Regge-plus-resonance approach

NUCLEAR REACTIONS 1H(K-, K+Ξ-), (K-, K0Ξ0), √ s=1.8-3.1 GeV; 1NN(K-, K0Ξ-), √ s=2.02 GeV; calculated σ(E), σ(θ), contributions from the s-channel hyperon resonances, contribution from rescattering. Effective Lagrangian approach based on a hybrid Regge-plus-resonance model with rescattering diagrams. Comparison to available experimental data.

doi: 10.1103/PhysRevC.107.065202
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2022CH39      Eur.Phys.J. A 58, 161 (2022)

S.Choi, E.Hiyama, C.H.Hyun, M.-K.Cheoun

Effects of many-body interactions in hypernuclei with Korea-IBS-Daegu-SKKU functionals

NUCLEAR STRUCTURE 16O, 28Si, 32S, 40Ca, 51V, 89Y, 139La, 208Pb, Sn; analyzed available data; calculated properties of Λ hyperon in Λ-hypernuclei using an effective nuclear density functional theory which is based on the low-energy effective field theory.

doi: 10.1140/epja/s10050-022-00817-4
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2022HE02      Phys.Rev. C 105, 014601 (2022); Erratum Phys.Rev. C 109, 039902 (2024)

K.Heo, M.-K.Cheoun, K.-S.Choi, K.S.Kim, W.Y.So

Coulomb breakup reaction of loosely bound 17F with dynamic polarization potentials

NUCLEAR REACTIONS 208Pb(17F, 17F), (17F, 17F'), (17F, X), E=98, 120, 170 MeV; analyzed optimized parameter sets of the dynamic polarization potential (DPPs) for the optical model; calculated inelastic, breakup, total fusion, Coulomb dipole excitation and total reaction σ(E), ratios of elastic, quasielastic and inelastic cross sections, angular distribution of the breakup reaction cross sections; deduced Coulomb strength distributions from B(E1) values. Optical model (OM) approach with the dynamical polarization potential, using Woods-Saxon potential, and a Love-type optical potential, with focus on breakup reaction channels. Comparison with experimental data.

doi: 10.1103/PhysRevC.105.014601
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2022KI04      Phys.Rev. C 105, 024606 (2022)

K.S.Kim, S.Choi, M.-K.Cheoun, H.Kim

Coulomb sum rule in the quasielastic region using various nuclear models

NUCLEAR REACTIONS 12C, 56Fe(e-, e-'), E=2.02 GeV; 40Ca(e-, e-'), E=290, 545 MeV; 208Pb(e-, e-'), E=262, 485 MeV; calculated σ(θ), longitudinal and transverse structure functions, Coulomb sum rule. Rosenbluth separation with four different nuclear models: the relativistic Hartree model (QHD), the nonlinear sigma model, the quark-meson-coupling (QMC) model and the chiral QMC model. Comparison to experimental data.

doi: 10.1103/PhysRevC.105.024606
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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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2022KO31      Astrophys.J. 937, 116 (2022)

H.Ko, D.Jang, M.-K.Cheoun, M.Kusakabe, H.Sasaki, X.Yao, T.Kajino, T.Hayakawa, M.Ono, T.Kawano, G.J.Mathews

Comprehensive Analysis of the Neutrino Process in Core-collapsing Supernovae

ATOMIC MASSES 7Li, 7Be, 11B, 11C, 92Nb, 98Tc, 138La, 180Ta; analyzed available data; deduced abundances for the neutrino flavor change effects due to neutrino self-interaction and shock wave propagation, as well as the matter effects on the neutrino process in core-collapsing supernovae (CCSNe).

doi: 10.3847/1538-4357/ac88cd
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2021CH15      Phys.Rev. C 103, 034611 (2021)

K.-S.Choi, K.S.Kim, M.-K.Cheoun, W.Y.So, K.Hagino

Fusion reaction of a weakly bound nucleus with a deformed target

NUCLEAR REACTIONS 232Th(14C, X), (14C, X), E(cm)=50-70 MeV; calculated fusion σ(E). 232Th(15C, X), E not given; calculated potential between the valence neutron in 15C and the target nucleus. 15C; calculated density distribution with contributions from the core nucleus and the valence neutron. Double folding procedure with deformed Woods-Saxon (WS) potential for the relative motion between the target and the projectile nuclei. Comparison with experimental data.

doi: 10.1103/PhysRevC.103.034611
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2021CH34      Phys.Rev. C 104, 014322 (2021)

S.Choi, T.Miyatsu, Y.Kwon, K.Kim, M.-K.Cheoun, K.Saito

Chiral quark-meson coupling models for finite nuclei and their (e, e'p) reactions

NUCLEAR STRUCTURE 16O, 40,48Ca, 90Zr, 208Pb; calculated binding energies per nucleon, charge radii, single particle energy spectra for 40Ca using chiral quark-meson coupling (CQMC) models. Comparison with results from the conventional quantum hadrodynamics (QHD)-like models, and with experimental data.

NUCLEAR REACTIONS 40Ca(e, e'p), E=375 MeV; calculated reduced cross section for the knocked-out proton from 2s1/2 and 1d3/2 orbits of 40Ca in parallel and perpendicular kinematics using the theoretical framework based on the distorted-wave impulse approximation (DWIA). Comparison with experimental data from NIKHEF facility.

doi: 10.1103/PhysRevC.104.014322
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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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2020HE07      Eur.Phys.J. A 56, 42 (2020)

K.Heo, M.-K.Cheoun, K.-S.Choi, K.S.Kim, W.Y.So

Extended optical model analyses of 11Be+197Au with dynamic polarization potentials

doi: 10.1140/epja/s10050-020-00056-5
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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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2019KI06      Phys.Rev. C 100, 034604 (2019)

K.S.Kim, K.-S.Choi, M.-K.Cheoun, W.Y.So, H.Moon

Role of axial mass and strange axial form factor from various target nuclei in neutrino-nucleus scattering

NUCLEAR REACTIONS 12C, 40Ca, 56Fe, 208Pb(ν, ν'), (ν-bar, ν-bar'), (ν, μ-), (ν-bar, μ+), E=1.0, 2.0 GeV neutrinos and muon-neutrinos; calculated differential σ(E), effects of strange axial form factor and axial mass for both neutral-current and charged-current reactions in quasi-elastic neutrino-nucleus scattering within a relativistic single-particle model on the differential cross section. Results compared with the MiniBooNE, T2K, and MINERνA experimental data for the double-differential cross section and the scaled total cross section.

doi: 10.1103/PhysRevC.100.034604
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2019KO30      Acta Phys.Pol. B50, 385 (2019)

H.Ko, M.-K.Cheoun, M.Kusakabe, T.Kajino, B.Ekinci, Y.Pehlivan

Effects of Shock Propagation on Neutrino Oscillation and ν-induced Nucleosynthesis in Supernova

NUCLEAR REACTIONS 138Ba(ν, e-)138La, E not given; calculated reaction rates, abundances in supernova in case of shock propagation effect on ν oscillation.

doi: 10.5506/aphyspolb.50.385
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2018CH19      Phys.Lett. B 780, 455 (2018)

K.-S.Choi, M.-K.Cheoun, W.Y.So, K.Hagino, K.S.Kim

Coupled-channels analyses for 9, 11Li + 208Pb fusion reactions with multi-neutron transfer couplings

NUCLEAR REACTIONS 208Pb(9Li, X), (11Li, X), E(cm)<45 MeV; analyzed available data; deduced fusion σ, nuclear potential.

doi: 10.1016/j.physletb.2018.03.049
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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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2018HA31      Phys.Rev.Lett. 121, 102701 (2018)

T.Hayakawa, H.Ko, M.-K.Cheoun, M.Kusakabe, T.Kajino, M.D.Usang, S.Chiba, K.Nakamura, A.Tolstov, K.Nomoto, M.-a.Hashimoto, M.Ono, T.Kawano, G.J.Mathews

Short-Lived Radioisotope 98Tc Synthesized by the Supernova Neutrino Process

NUCLEAR REACTIONS 98Mo(ν, E)98Tc, 99Tc(ν, ν'n)98Tc, 99Ru(ν, ν'p)98Tc, E=1-9 MeV; calculated yields, abundances as a function of interior mass from the Supernova; deduced dominance the charged current reaction on 98Mo reaction.

doi: 10.1103/PhysRevLett.121.102701
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2017CH33      Phys.Rev. C 96, 024311 (2017)

S.Choi, Y.Zhang, M.-K.Cheoun, Y.Kwon, K.Kim, H.Kim

Effects of pairing correlations on the neutron skin thickness and the symmetry energy

NUCLEAR STRUCTURE 40,48Ca, 58,60,64Ni, 54,56,57Fe, 59Co, 90,96Zr, 106,116Cd, 112,116,120,124Sn, 122,124,126,128,130Te, 208Pb, 209Bi, 232Th, 238U; calculated neutron skin thickness (NST). 180,184,188,192,196,200,204,208,212Pb, 120,124,128,132,136,140,144,148,152Sn; calculated symmetry energies and asymmetry coefficients. 196Pb, 144Sn; calculated symmetry energy density distributions. Skyrme Hartree-Fock-Bogoliubov (HFB) model with SkI3, SLy4, SVI interactions and density-dependent δ interaction (DDDI) for the pairing force. Comparison of neutron skin thickness with experimental data from antiprotonic studies.

doi: 10.1103/PhysRevC.96.024311
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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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2017SH24      J.Phys.(London) G44, 09LT01 (2017)

J.W.Shin, M.-K.Cheoun, T.Kajin, T.Hayakawa

A new scheme for short baseline electron antineutrino disappearance study

RADIOACTIVITY 8Li(β-) [from 7Li(n, γ), E ∼ 2 MeV]; analyzed available data; deduced antineutrino flux.

doi: 10.1088/1361-6471/aa809e
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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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2016KI07      Eur.Phys.J. A 52, 107 (2016)

K.S.Kim, M.-K.Cheoun, H.Kim, W.Y.So

The effects of density-dependent form factors for (e, e'p) reaction in quasi-elastic region

NUCLEAR REACTIONS 208Pb(e, e'p), E=412 MeV; calculated reduced dσ for knocked-out protons from different shells using relativistic single-particle model with density-dependent electromagnetic form-factors. Compared with NIKHEF data.

doi: 10.1140/epja/i2016-16107-1
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2016KI13      Eur.Phys.J. A 52, 184 (2016)

H.Kim, K.S.Kim, M.-K.Cheoun, D.Jido, M.Oka

Testing the tetraquark structure for the X resonances in the low-lying region

doi: 10.1140/epja/i2016-16184-0
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2016KI18      Phys.Rev. C 94, 064619 (2016)

K.S.Kim, H.Kim, M.-K.Cheoun, W.Y.So

Extraction of structure functions for lepton-nucleus scattering in the quasi-elastic region

NUCLEAR REACTIONS 40Ca(e, e'), (ν, ν'), (ν-bar, ν-bar'), (ν, e-), E=200, 800 MeV; calculated σ(θ, E); deduced structure functions for inclusive reactions. Relativistic single-particle model.

doi: 10.1103/PhysRevC.94.064619
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2016SH37      Phys.Rev. C 94, 045804 (2016)

J.W.Shin, M.-K.Cheoun, T.-S.Park, T.Kajino

New neutrino source for the study of solar neutrino physics in the vacuum-matter transition region

NUCLEAR REACTIONS 27Al(p, n)27Si, E=5-20 MeV; analyzed σ(E) data with hadronic models of GEANT4 and the nuclear data model; calculated normalized energy distribution of electron-neutrinos through the radioactive decay of 27Si in 0-5 MeV range, close to solar neutrino physics; proposed target systems required for future solar neutrino experiments. 2H(ν, e-)2p, (ν, ν), 37Cl(ν, e-)37Ar, 71Ga(ν, e-)71Ge, E=0-5 MeV; calculated total reaction rates by electron-neutrino spectra, expected event rates and their ratios for LENA-type detector.

doi: 10.1103/PhysRevC.94.045804
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2016SO06      Phys.Rev. C 93, 054624 (2016); Erratum Phys.Rev. C 109, 039901 (2024)

W.Y.So, K.S.Choi, M.-K.Cheoun, K.S.Kim

Evidence for a large radius of the 11Be projectile

NUCLEAR REACTIONS 64Zn, 120Sn(11Be, 11Be), (11Be, X); calculated ratio of elastic scattering cross section to Rutherford cross section PE as function of angle, differential σ(θ) for breakup process, B(E1), rms radii between 10Be and valence neutron for 11Be using optical model with long range dynamic polarization potential as well as the short-range nuclear bare potential. Comparison with experimental data.

doi: 10.1103/PhysRevC.93.054624
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2015CH18      J.Phys.(London) G42, 345102 (2015)

M.-K.Cheoun, K.S.Kim, H.Kim, W.Y.So, T.Maruyama, T.Kajino

In-medium effect with muon-neutrino and anti-muon-neutrino quasi-elastic scattering from 12C nucleons

doi: 10.1088/0954-3899/42/4/045102
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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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2015KI01      Phys.Rev. C 91, 014606 (2015)

K.S.Kim, M.-K.Cheoun, W.Y.So, H.C.Kim

Effects of density-dependent weak form factors on neutral-current neutrino (antineutrino)-nucleus scattering in the quasi-elastic region

NUCLEAR REACTIONS 12C(e, e'), E=2.02 GeV; calculated double differential σ as function of energy transfer, 12C(ν, ν'), (ν-bar, ν'-bar), E=0.5, 1.5 GeV; calculated differential, longitudinal and interference σ, and asymmetry as function of the kinetic energy of the knocked-out proton and neutron, flux-averaged differential cross sections; deduced effects of density-dependent form factors on the differential cross sections. Relativistic single-particle model, with the density-dependent weak form factors from a quark-meson coupling model. Comparison with experimental data.

doi: 10.1103/PhysRevC.91.014606
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2015KI08      Phys.Rev. C 92, 044613 (2015)

K.S.Kim, H.Kim, M.-K.Cheoun, G.-S.Yang, W.Y.So

Influence of axial mass and strange axial form factor on neutrino-nucleus scattering in the quasielastic region

NUCLEAR REACTIONS 12C(ν, ν'), (ν-bar, ν'-bar), E=0.5, 1.5 GeV; calculated differential cross sections as function of knocked-out neutron and proton kinetic energies, flux-averaged differential cross sections, asymmetry of flux-averaged differential cross sections, 12C(ν, μ-), (ν-bar, μ+), Q2<2 GeV/c2; calculated Flux-averaged differential cross sections, asymmetry of flux-averaged differential cross sections. Investigated effects of strange axial form factor (GA) and the axial mass (AM) within the framework of relativistic single-particle model. Comparison with MiniBooNE experimental data.

doi: 10.1103/PhysRevC.92.044613
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2015SO14      Phys.Rev. C 92, 014627 (2015)

W.Y.So, K.S.Kim, K.S.Choi, M.-K.Cheoun

Long-range dynamic polarization potentials for 11Be projectiles on 64Zn

NUCLEAR REACTIONS 64Zn(9Be, X), (10Be, X), (11Be, X), E not given; calculated ratio of elastic scattering cross sections to Rutherford cross section, as function of center-of-mass angle, and compared with experimental data. 64Zn(11Be, X), E not given; calculated ratio of elastic scattering cross sections to Rutherford cross section as function of scattering angle using the SRN+CDE+LRN, SRN+CDE, SRN+inelastic and SRN potentials, B(E1) distributions, angular distribution of breakup cross section, inelastic, fusion, breakup, and total reaction cross sections. A χ2 analysis of an optical model including the long-range dynamic polarization (LRDP) potential and conventional short-range nuclear (SRN) potential. Comparison with experimental data.

doi: 10.1103/PhysRevC.92.014627
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2015SO21      Phys.Rev. C 92, 044618 (2015)

W.Y.So, K.S.Choi, M.K.Cheoun, K.S.Kim

Inelastic scattering of 11Be+197Au to the first excited state in 11Be

NUCLEAR REACTIONS 197Au(11Be, 11Be), (11Be, 11Be'), E(cm)=20.1, 30.1, 40.1 MeV; calculated ratios of inelastic scattering cross section to Rutherford cross section as function of scattering angle, contribution of inelastic scattering to the first excited state of 11Be. Comparison with experimental data. Optical model potential including an inelastic scattering potential and a short-range nuclear potential.

doi: 10.1103/PhysRevC.92.044618
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2014CH19      Chin.J.Phys.(Taiwan) 52, 729 (2014)

H.G.Cho, B.Y.Moon, K.S.Kim, M.-K.Cheoun, T.H.Kim, W.Y.So

Comparing a Local Potential with a Non-Local Potential for the Bound States of 16O and 40Ca

NUCLEAR STRUCTURE 16O, 40Ca; calculated binding energies and radial wave functions, proton charge density. Non-local nuclear potentials.


2014KI06      Phys.Rev. C 90, 017601 (2014)

K.S.Kim, M.-K.Cheoun, W.Y.So

Effects of density-dependent weak form factors on charged-current neutrino-nucleus scattering in the quasi-elastic region

NUCLEAR REACTIONS 12C(e, e'), E=2.02 GeV; analyzed differential cross sections data. 12C(ν, μ-), (ν, μ+), E=0.5-1.5 GeV; analyzed differential σ(E); deduced density dependence on differential cross sections. Relativistic single-particle model.

doi: 10.1103/PhysRevC.90.017601
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2014MA13      Phys.Rev. C 89, 035801 (2014)

T.Maruyama, J.Hidaka, T.Kajino, N.Yasutake, T.Kuroda, T.Takiwaki, M.-K.Cheoun, C.-Y.Ryu, G.J.Mathews

Rapid spin deceleration of magnetized protoneutron stars via asymmetric neutrino emission

doi: 10.1103/PhysRevC.89.035801
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2014SO07      Phys.Rev. C 89, 057601 (2014)

W.Y.So, K.S.Kim, M.-K.Cheoun

Effect of long range potentials on the elastic cross section for the 11Li+208Pb system

NUCLEAR REACTIONS 208Pb(9Li, 9Li), (11Li, 11Li), E(cm)=28.3 MeV; calculated σ(θ), Coulomb dipole strength B(E1) from breakup reactions using optical model calculation for the Coulomb dipole excitation (CDE) effect, including the effect of the long-range interaction. Comparison with experimental data.

doi: 10.1103/PhysRevC.89.057601
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2014SO19      Phys.Rev. C 90, 054615 (2014)

W.Y.So, K.S.Kim, K.S.Choi, M.-K.Cheoun

Long-range dynamic polarization potentials for 11Li + 208Pb and 6He + 208Pb systems

NUCLEAR REACTIONS 208Pb(α, α), E=22, 27 MeV; 208Pb(6He, 6He), E=14, 16, 18, 22, 27 MeV; 208Pb(9Li, 9Li), (11Li, 11Li), E=23.1, 28.3 MeV; analyzed ratios of elastic scattering cross sections to Rutherford cross sections, B(E1) distributions ; deduced Coulomb dipole excitation (CDE) potential and long-range nuclear (LRN) potential effects on elastic cross sections for heavy-ion collisions.

doi: 10.1103/PhysRevC.90.054615
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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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2013CH40      Phys.Rev. C 87, 065502 (2013)

M.K.Cheoun, K.S.Choi, K.S.Kim, K.Saito, T.Kajino, K.Tsushima, T.Maruyama

Effects of the density-dependent weak form factors on the neutrino reaction via neutral current for the nucleon in nuclear matter and 12C

NUCLEAR REACTIONS 12C(ν, ν'), (ν-bar, ν-bar'), E<80 MeV; calculated density-dependent form factors for electron neutrino and electron antineutrino collisions with 12C, σ(E). Large asymmetry in the antineutrino cross sections due to difference in helicities of neutrino and antineutrino. Quark-meson-coupling (QMC) model.

doi: 10.1103/PhysRevC.87.065502
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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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2013KI02      J.Phys.Soc.Jpn. 82, 024201 (2013)

K.Kim, M.-K.Cheoun

Possible Uncertainties of Parity Violation in Electron Quasi-Elastic Scattering

NUCLEAR REACTIONS 208Pb(E, E), E=03, 0.5, 1 GeV; analyzed available data; deduced form factors, Coulomb effects on the parity violation asymmetry.

doi: 10.7566/JPSJ.82.024201
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2013KI10      Phys.Rev. C 88, 044615 (2013)

K.S.Kim, M.-K.Cheoun, W.Y.So

Ambiguity of the final state interaction for neutral-current neutrino-nucleus scattering in the quasielastic region

NUCLEAR REACTIONS 12C(ν, ν), (ν-bar, ν-bar), E=0.5, 1 GeV; calculated differential cross sections as function of kinetic energy of the knocked-out nucleons, protons and neutrons in quasielastic region. Final-state interaction (FSI) effects. Relativistic single-particle model. Comparison with experimental data from MiniBooNE experiment.

doi: 10.1103/PhysRevC.88.044615
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2013MA52      J.Phys.:Conf.Ser. 445, 012023 (2013)

G.J.Mathews, M.Meixner, J.P.Olson, I.-S.Suh, T.Kajino, T.Maruyama, J.Hidaka, C.-Y.Ryu, M.-K.Cheoun, N.Q.Lan

Updates of the nuclear equation of state for core-collapse supernovae and neutron stars: effects of 3-body forces, QCD, and magnetic fields

doi: 10.1088/1742-6596/445/1/012023
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2013MI14      Phys.Rev. C 88, 015802 (2013)

T.Miyatsu, M.K.Cheoun, K.Saito

Equation of state for neutron stars in SU(3) flavor symmetry

doi: 10.1103/PhysRevC.88.015802
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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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2012CH38      Prog.Theor.Phys.(Kyoto), Suppl. 196, 476 (2012)

M.-K.Cheoun, T.Kajino

Neutrino Induced Reactions with the Nuclei in Core Collapsing Supernovae

NUCLEAR REACTIONS 40Ar, 138Ba, 139La, 181Ta, 180Hf(ν, e), E not given; calculated σ, Gamow-Teller strength distributions. QRPA calculations, comparison with experimental data.

doi: 10.1143/PTPS.196.476
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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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2012RY01      Phys.Rev. C 85, 045803 (2012)

C.-Y.Ryu, T.Maruyama, T.Kajino, G.J.Mathews, M.-K.Cheoun

Spin change of a proto-neutron star by the emission of neutrinos

doi: 10.1103/PhysRevC.85.045803
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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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2011KI06      Phys.Rev. C 83, 034607 (2011)

K.S.Kim, M.-K.Cheoun

Inclusive charged-current neutrino-nucleus scattering in the quasielastic region

NUCLEAR REACTIONS 12C, 40Ca, 208Pb(ν, μ-), (ν-bar, μ+), E=0.2-2 GeV; calculated σ, differential σ(θ) using relativistic mean-field (RMF) theory.

doi: 10.1103/PhysRevC.83.034607
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2011RY01      Phys.Rev. C 83, 018802 (2011)

C.Y.Ryu, T.Maruyama, T.Kajino, M.-K.Cheoun

Properties of a proto-neutron star with smeared trapped neutrinos

doi: 10.1103/PhysRevC.83.018802
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2011RY07      J.Korean Phys.Soc. 59, 1521s (2011)

C.Y.Ryu, M.K.Cheoun, C.H.Hyun

Theoretical Calculation of the Anomalous Magnetic Moments of Baryons in Heavy Ion Collision

doi: 10.3938/jkps.59.1521
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2011RY11      J.Korean Phys.Soc. 59, 2110s (2011)

C.Y.Ryu, M.K.Cheoun

Proto-Neutron Star with Trapped Neutrinos

doi: 10.3938/jkps.59.2110
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2011RY12      J.Phys.:Conf.Ser. 312, 042021 (2011)

C.Y.Ryu, M.-K.Cheoun

The medium effect of magnetic moments of baryons on the neutron star under strong magnetic fields

doi: 10.1088/1742-6596/312/4/042021
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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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2010RY02      Phys.Rev. C 82, 025804 (2010)

C.Y.Ryu, K.S.Kim, M.-K.Cheoun

Medium effects of magnetic moments of baryons on neutron stars under strong magnetic fields

doi: 10.1103/PhysRevC.82.025804
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2009CH49      J.Korean Phys.Soc. 55, 2116s (2009)

M.-K.Cheoun, S.Y.Lee, C.S.Lee, J.H.Lee, K.S.Kim, W.Y.So

A Description of Neutrino Reaction on 12C with Quasi-particle Shell Model

NUCLEAR REACTIONS 12C(ν, e)12N, E=3-30 MeV; calculated structure wave functions for deformed nuclei. Quasi-particle shell model.

doi: 10.3938/jkps.55.2116
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2009KI12      J.Korean Phys.Soc. 55, 1394 (2009)

K.S.Kim, M.K.Cheoun, Y.G.Chung

Strangeness Effects on the Exclusive Neutrino-nucleus Scattering in the Quasielastic Region

doi: 10.3938/jkps.55.1394
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2008KI11      Phys.Rev. C 77, 054604 (2008)

K.S.Kim, M.-K.Cheoun, B.G.Yu

Effect of strangeness for neutrino (antineutrino) scattering in the quasi-elastic region

NUCLEAR REACTIONS p, n, 12C(ν, ν), (ν-bar, ν-bar), E=0.500, 1 GeV; calculated σ, asymmetries, ratios between neutral- and charged- current reactions. Relativistic single-particle model.

doi: 10.1103/PhysRevC.77.054604
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2008KW01      J.Korean Phys.Soc. 53, 1141 (2008)

Y.K.Kwon, C.S.Lee, J.Y.Moon, J.H.Lee, J.Y.Kim, M.K.Cheoun, S.Kubono, N.Iwasa, K.Inafuku, H.Yamaguchi, J.J.He, A.Saito, Y.Wakabayashi, H.Fujikawa, G.Amadio, L.H.Khiem, M.Tanaka, A.A.Chen, S.Kato, Y.Fuchi, N.Fukunishi

Astrophysically Important 26Si States Studied with the 28Si(4He, 6He)26Si Reaction

NUCLEAR REACTIONS 28Si(α, 6He), E=120 MeV; measured charged particle spectra, σ(θ). 26Si; deduced level energies.

doi: 10.3938/jkps.53.1141
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2007CH30      J.Korean Phys.Soc. 50, 955 (2007)

M.K.Cheoun, K.S.Kim

The 2νββ Decay in 9640Zr56 and the Gamow-Teller Strength in 9641Nb55 by Using a Quasi-Particle RPA Calculation

RADIOACTIVITY 96Zr(2β-); calculated 2νββ-decay matrix elements, Gamow-Teller strength vs particle-particle strength parameter. 96Zr(β-); 96Mo(β+); calculated Gamow-Teller strength. Quasiparticle RPA approach.

doi: 10.3938/jkps.50.955
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2007CH33      Phys.Lett. B 645, 422 (2007)

M.K.Cheoun, K.S.Kim

The pseudo-scalar form factor of the nucleon, the sigma-like term, and the L+0 amplitude for charged pion electro-production near threshold

doi: 10.1016/j.physletb.2006.12.064
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2007KI11      Phys.Rev. C 76, 018202 (2007)

K.S.Kim, B.G.Yu, M.K.Cheoun

Extraction of the longitudinal and transverse response functions in (e, e' p) reactions

doi: 10.1103/PhysRevC.76.018202
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2006KI16      J.Phys.Soc.Jpn. 75, 114201 (2006)

K.S.Kim, B.G.Yu, M.K.Cheoun

Investigating the Suppressions for the Longitudinal Structure Function in High Energy Quasielastic Scattering from 56Fe

NUCLEAR REACTIONS 56Fe(e, e'), E=2-4 GeV; calculated quasielastic σ(E, θ); deduced no longitudinal suppression. Comparison with data.

doi: 10.1143/JPSJ.75.114201
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2006KI19      Phys.Rev.C 74, 067601 (2006)

K.S.Kim, B.G.Yu, M.K.Cheoun

Coulomb sum rule in the quasielastic region

NUCLEAR REACTIONS 40Ca, 208Pb(e, e'X), E ≈ 20-200 MeV; analyzed longitudinal and transverse structure functions, Coulomb sum rule.

doi: 10.1103/PhysRevC.74.067601
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2004CH39      J.Phys.Soc.Jpn. 73, 2117 (2004)

M.K.Cheoun, K.S.Kim

Discussions of Ambiguities on Current Operators in Exclusive (e, e'p) Reactions for Intermediate Electron Energy

NUCLEAR REACTIONS 40Ca, 208Pb(e, e'p), E ≈ 375-500 MeV; calculated σ(E, θ), role of medium effects, gauge uncertainty.

doi: 10.1143/JPSJ.73.2117
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2004CH56      J.Korean Phys.Soc. 45, 872 (2004)

M.K.Cheoun, K.S.Kim, T.K.Choi

Coupling Constants Deduced for the Resonances in Kaon Photo-production


2003CH07      J.Phys.(London) G29, 293 (2003)

M.K.Cheoun, I.-T.Cheon

An analysis of the models for the radiative muon capture on a proton

NUCLEAR REACTIONS 1H(μ-, ν), E not given; analyzed Eγ for radiative capture; deduced coupling constant.

doi: 10.1088/0954-3899/29/2/306
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2003CH42      J.Phys.(London) G29, 2099 (2003)

M.K.Cheoun, K.S.Kim, T.K.Choi

Radiative muon capture and induced pseudoscalar coupling constant in nuclear matter

NUCLEAR REACTIONS 1H(μ-, ν), E not given; analyzed ordinary and radiative muon capture data; deduced induced pseudoscalar coupling constant.

doi: 10.1088/0954-3899/29/9/305
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2003KI03      Phys.Rev. C 67, 034603 (2003)

K.S.Kim, M.K.Cheoun

Effects of the form factor on inclusive (e, e') reactions in the quasielastic region

NUCLEAR REACTIONS 40Ca(e, e'), E=290, 375 MeV; 208Pb(e, e'), E=262, 420 MeV; calculated σ(E, θ), medium effects, structure functions. Comparison with data.

doi: 10.1103/PhysRevC.67.034603
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2002KI14      Eur.Phys.J. A 14, 239 (2002)

K.S.Kim, M.K.Cheoun, S.W.Hong, Y.Chung

Contribution of the Δ(1232) to the (e, e'p) Reaction Along with Coulomb Distortion Effects

NUCLEAR REACTIONS 40Ca(e, e'p), E=500 MeV; calculated σ(θ) for different proton shell numbers. DWBA results, effects of Δ(1232) discussed.

doi: 10.1140/epja/i2001-10123-2
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2002SH17      Eur.Phys.J. A 14, 87 (2002)

Y.C.Shin, M.K.Cheoun, K.S.Kim, T.K.Choi

A Role of the Axial-Vector Mesons on the Photon Production in Heavy-Ion Collisions and Their Relevant Decays

doi: 10.1007/s10050-002-8793-2
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2001HA48      Nucl.Phys. A691, 713 (2001)

B.S.Han, M.K.Cheoun, K.S.Kim, Il.-T.Cheon

An Isobaric Model for Kaon Photoproduction

NUCLEAR REACTIONS 1H(γ, K+), E < 2.0 GeV; calculated kaon production σ, σ(θ), polarization observables. Isobaric model, comparison with data.

doi: 10.1016/S0375-9474(01)00584-X
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2001KI27      Eur.Phys.J. A 11, 147 (2001)

K.S.Kim, M.K.Cheoun, Y.Chung, H.J.Nam

Phase Shift Analysis and Extraction of Structure Functions for Coulomb Distortion on (e, e'p) Reactions at High Electron Energies

NUCLEAR REACTIONS 16O, 208Pb(e, ep), E=412-2441.6 MeV; calculated phase shifts, σ(θ), σ vs momentum, structure functions. DWBA, comparison with data.

doi: 10.1007/s100500170080
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2000HU04      Eur.Phys.J. A 7, 11 (2000)

J.Y.Huh, C.S.Lee, Y.K.Kwon, J.Y.Kim, Y.Gono, T.Morikawa, H.Watanabe, M.Shibata, S.Motomura, T.Tsutsumi, T.Fukuchi, T.Kishida, E.Ideguchi, X.H.Zhou, A.Odahara, S.Kubono, J.H.Ha, M.K.Cheoun, C.Lee, J.C.Kim, C.-B.Moon, S.J.Chae, Y.K.Kim, J.S.Chai

Observation of Intermediate Bands Feeding the Positive-Parity Yrast Band in 155Gd

NUCLEAR REACTIONS 154Sm(α, 3n), E=33 MeV; measured Eγ, Iγ, γγ-coin. 155Gd deduced high-spin levels, J, π, B(E2), configurations.

doi: 10.1007/s100500050003
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2000KI18      Eur.Phys.J. A 8, 131 (2000)

K.S.Kim, M.K.Cheoun, Il.-T.Cheon, Y.Chung

Effects of the Form Factor on Exclusive (e, e'p) Reactions

NUCLEAR REACTIONS 40Ca(e, e'p), E=375 MeV; 208Pb(e, e'p), E=412.3 MeV; calculated reduced σ vs nucleon momentum; deduced role of in-medium form factor, sensitivity to anomalous magnetic moments. Comparisons with data.

doi: 10.1007/s100530050017
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2000KI27      J.Phys.Soc.Jpn. 69, 2034 (2000)

K.S.Kim, M.K.Cheoun, Il.-T.Cheon, Y.Chung

Effects of Coulomb Distortion on the Second, Fourth, and Fifth Structure Functions and the Asymmetry for (e, e'p) Reactions for High Electron Energy

NUCLEAR REACTIONS 16O(e, e'p), E=2441.6 MeV; calculated σ(E, θ), structure functions, left-right asymmetry; deduced Coulomb distortion effects. Comparison with data.

doi: 10.1143/JPSJ.69.2034
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2000SH46      Eur.Phys.J. A 9, 269 (2000)

Y.C.Shin, B.S.Han, M.K.Cheoun, K.S.Kim, Il.-T.Cheon

Pion and Kaon Electromagnetic Form Factors in a SUL(3) (x) SUR(3) Effective Lagrangian

doi: 10.1007/s100500070044
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1999KO23      Phys.Rev. C59, 3473 (1999)

Y.Ko, M.K.Cheoun, Il.-T.Cheon

Importance of the Doppler Effect for the Determination of the Deuteron Binding Energy

NUCLEAR REACTIONS 1H(n, γ), E not given; analyzed data; deduced Doppler effects in deuteron binding energy uncertainty.

doi: 10.1103/PhysRevC.59.3473
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1996CH06      Phys.Rev. C53, 1363 (1996)

S.Choe, M.K.Cheoun, S.H.Lee

g(KNΛ) and g(KNΣ) from QCD Sum Rules

doi: 10.1103/PhysRevC.53.1363
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1996CH30      Phys.Rev. C54, 1811 (1996)

M.K.Cheoun, B.S.Han, B.G.Yu, Il.-T.Cheon

Kaon Photoproduction Near Threshold and Their Coupling Constants

NUCLEAR REACTIONS 1H(γ, X), E=910-925 MeV; calculated Λ production σ(E); deduced leading coupling constant g(KNΛ) estimation method.

doi: 10.1103/PhysRevC.54.1811
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1995CH20      Nucl.Phys. A587, 301 (1995)

M.K.Cheoun, A.Faessler, F.Simkovic, G.Teneva, A.Bobyk

Total Gamow-Teller Strength, Ground-State Corrections and Sum Rules in QRPA with Neutron-Proton Pairing

NUCLEAR STRUCTURE 54Fe; calculated β+-decay, β--decay Gamow-Teller transition strength vs particle-particle strength. 46,48Ti, 46,48,50Ca; calculated β-decay Gamow-Teller transition strength. Quasiparticle RPA.

doi: 10.1016/0375-9474(95)00016-T
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1995TE01      Nucl.Phys. A586, 249 (1995)

G.Teneva, F.Simkovic, A.Bobyk, M.K.Cheoun, A.Faessler, S.B.Khadkikar

Two-Vacua RPA and the Two-Neutrino DOuble-Beta Decay

RADIOACTIVITY 48Ca(2β); calculated Gamow-Teller strength functions, 2ν-accompanied 2β-decay. Two-vacua RPA.

doi: 10.1016/0375-9474(94)00795-O
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1994CH15      Phys.Rev. C49, 1927 (1994)

M.K.Cheoun, M.Maruyama, S.Ishikawa, T.Sasakawa

Photopion Production in 3H and 3He

NUCLEAR REACTIONS 3He(γ, π+), E=200-450 MeV; 3He(π+, π+), E=50-295 MeV; calculated σ(θ). DWIA with final state interactions.

doi: 10.1103/PhysRevC.49.1927
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1993CH29      Nucl.Phys. A561, 74 (1993)

M.K.Cheoun, A.Bobyk, A.Faessler, F.Simkovic, G.Teneva

Neutron-Proton Pairing in Light Nuclei and Two-Neutrino Double-Beta Decay

RADIOACTIVITY 48Ca(2β); calculated 2ν-accompanied 2β-decay T1/2, Gamow-Teller matrix element vs (particle)(particle) strength parameter. Specialized Hartree-Fock-Bogoliubov method.

NUCLEAR STRUCTURE 46,48Ti, 50Cr, 58,60Ni, 62,64Zn; calculated HFB, BCS nucleon pairing gaps. Specialized Hartree-Fock-Bogoliubov method.

doi: 10.1016/0375-9474(93)90166-U
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1993CH34      Nucl.Phys. A564, 329 (1993)

M.K.Cheoun, A.Bobyk, A.Faessler, F.Simkovic, G.Teneva

Two-Neutrino Double-Beta Decay in Coupled QRPA with Neutron-Proton Pairing

RADIOACTIVITY 46,48Ca, 76Ge, 82Se(2β); calculated 2ν-accompanied double β-decay rates; deduced np pairing correlations role, particle-particle strength parameter dependences.

doi: 10.1016/0375-9474(93)90508-U
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