Neutron transition strengths of $2^+_1$ states in the neutron rich Oxygen isotopes determined from inelastic proton scattering
| dc.creator | Chien, Nguyen Dang | |
| dc.creator | Khoa, Dao T. | |
| dc.date | 2008-11-26 | |
| dc.date | 2009-02-25 | |
| dc.date.accessioned | 2026-07-07T13:08:42Z | |
| dc.date.available | 2026-07-07T13:08:42Z | |
| dc.description | A coupled-channel analysis of the $^{18,20,22}$O$(p,p')$ data has been performed to determine the neutron transition strengths of 2$^+_1$ states in Oxygen targets, using the microscopic optical potential and inelastic form factor calculated in the folding model. A complex density- and \emph{isospin} dependent version of the CDM3Y6 interaction was constructed, based on the Brueckner-Hatree-Fock calculation of nuclear matter, for the folding model input. Given an accurate isovector density dependence of the CDM3Y6 interaction, the isoscalar ($δ_0$) and isovector ($δ_1$) deformation lengths of 2$^+_1$ states in $^{18,20,22}$O have been extracted from the folding model analysis of the $(p,p')$ data. A specific $N$-dependence of $δ_0$ and $δ_1$ has been established which can be linked to the neutron shell closure occurring at $N$ approaching 16. The strongest isovector deformation was found for 2$^+_1$ state in $^{20}$O, with $δ_1$ about 2.5 times larger than $δ_0$, which indicates a strong core polarization by the valence neutrons in $^{20}$O. The ratios of the neutron/proton transition matrix elements ($M_n/M_p$) determined for 2$^+_1$ states in $^{18,20}$O have been compared to those deduced from the mirror symmetry, using the measured $B(E2)$ values of 2$^+_1$ states in the proton rich $^{18}$Ne and $^{20}$Mg nuclei, to discuss the isospin impurity in the $2^+_1$ excitation of the $A=18,T=1$ and $A=20,T=2$ isobars. | |
| dc.description | Version accepted for publication in Physical Review C | |
| dc.identifier | https://arxiv.org/abs/0811.4261 | |
| dc.identifier | http://arxiv.org/abs/0811.4261 | |
| dc.identifier | Phys.Rev.C79:034314,2009 | |
| dc.identifier | doi:10.1103/PhysRevC.79.034314 | |
| dc.identifier.uri | http://salesiana.dossiersoluciones.com/handle/123456789/228500 | |
| dc.subject | Nuclear Theory | |
| dc.subject | Nuclear Experiment | |
| dc.title | Neutron transition strengths of $2^+_1$ states in the neutron rich Oxygen isotopes determined from inelastic proton scattering | |
| dc.type | text |