Neutron transition strengths of 21+ states in the neutron-rich oxygen isotopes determined from inelastic proton scattering
A coupled-channel analysis of the 18,20,22O(p,p′) data has been performed to determine the neutron transition strengths of the 2+1 states in oxygen targets, using the microscopic optical potential and inelastic form factor calculated in the folding model. A complex density- and isospin-dependent ver...
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A coupled-channel analysis of the 18,20,22O(p,p′) data has been performed to determine the neutron transition strengths of the 2+1 states in oxygen targets, using the microscopic optical potential and inelastic form factor calculated in the folding model. A complex density- and isospin-dependent version of the CDM3Y6 interaction was constructed, based on the Brueckner-Hartree-Fock calculation of nuclear matter, for the folding model input. Given an accurate isovector density dependence of the CDM3Y6 interaction, the isoscalar (δ0) and isovector (δ1) deformation lengths of the 2+1 states in 18,20,22O have been extracted from the folding model analysis of the (p,p′) data. A specific N dependence of δ0 and δ1 has been established which can be linked to the neutron shell closure occurring at N approaching 16. The strongest isovector deformation was found for the 2+1 state in 20O, with δ1 about 2.5 times larger than δ0, which indicates a strong core polarization by the valence neutrons in 20O. The ratios of the neutron/proton transition matrix elements (Mn/Mp) determined for the 2+1 states in 18,20O have been compared with those deduced from the mirror symmetry, using the measured B(E2) values of the 2+1 states in the proton-rich 18Ne and 20Mg nuclei, to discuss the isospin impurity in the 2+1 excitation of the A=18, T=1 and A=20, T=2 isobars. |
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Nguyễn, Đăng Chiến Dao Tien Khoa |
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Nguyễn, Đăng Chiến Dao Tien Khoa Neutron transition strengths of 21+ states in the neutron-rich oxygen isotopes determined from inelastic proton scattering |
| author_facet |
Nguyễn, Đăng Chiến Dao Tien Khoa |
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Nguyễn, Đăng Chiến |
| title |
Neutron transition strengths of 21+ states in the neutron-rich oxygen isotopes determined from inelastic proton scattering |
| title_short |
Neutron transition strengths of 21+ states in the neutron-rich oxygen isotopes determined from inelastic proton scattering |
| title_full |
Neutron transition strengths of 21+ states in the neutron-rich oxygen isotopes determined from inelastic proton scattering |
| title_fullStr |
Neutron transition strengths of 21+ states in the neutron-rich oxygen isotopes determined from inelastic proton scattering |
| title_full_unstemmed |
Neutron transition strengths of 21+ states in the neutron-rich oxygen isotopes determined from inelastic proton scattering |
| title_sort |
neutron transition strengths of 21+ states in the neutron-rich oxygen isotopes determined from inelastic proton scattering |
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APS publications |
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2024 |
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https://scholar.dlu.edu.vn/handle/123456789/3301 |
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1798256983202070528 |
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oai:scholar.dlu.edu.vn:123456789-33012024-03-01T08:25:06Z Neutron transition strengths of 21+ states in the neutron-rich oxygen isotopes determined from inelastic proton scattering Nguyễn, Đăng Chiến Dao Tien Khoa A coupled-channel analysis of the 18,20,22O(p,p′) data has been performed to determine the neutron transition strengths of the 2+1 states in oxygen targets, using the microscopic optical potential and inelastic form factor calculated in the folding model. A complex density- and isospin-dependent version of the CDM3Y6 interaction was constructed, based on the Brueckner-Hartree-Fock calculation of nuclear matter, for the folding model input. Given an accurate isovector density dependence of the CDM3Y6 interaction, the isoscalar (δ0) and isovector (δ1) deformation lengths of the 2+1 states in 18,20,22O have been extracted from the folding model analysis of the (p,p′) data. A specific N dependence of δ0 and δ1 has been established which can be linked to the neutron shell closure occurring at N approaching 16. The strongest isovector deformation was found for the 2+1 state in 20O, with δ1 about 2.5 times larger than δ0, which indicates a strong core polarization by the valence neutrons in 20O. The ratios of the neutron/proton transition matrix elements (Mn/Mp) determined for the 2+1 states in 18,20O have been compared with those deduced from the mirror symmetry, using the measured B(E2) values of the 2+1 states in the proton-rich 18Ne and 20Mg nuclei, to discuss the isospin impurity in the 2+1 excitation of the A=18, T=1 and A=20, T=2 isobars. 79 3 034314 2024-03-01T08:25:00Z 2024-03-01T08:25:00Z 2009 Journal article Bài báo đăng trên tạp chí thuộc ISI, bao gồm book chapter https://scholar.dlu.edu.vn/handle/123456789/3301 10.1103/PhysRevC.79.034314 en Physical Review C 2469-9985 [1] A. M. Bernstein, V. R. Brown, and V. A. Madsen, Comm. Nucl. Part. 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