Search for the missing d -wave neutron excitation states in B13

Le résumé fourni par la source

A $^{13}\mathrm{B}(d,{d}^{\ensuremath{'}})$ inelastic scattering experiment was carried out using a 23 MeV/nucleon $^{13}\mathrm{B}$ beam in order to search for the missing positive parity state with a configuration of $^{12}{\mathrm{B}}_{\mathrm{g}.\mathrm{s}.}\ensuremath{\bigotimes}{d}_{5/2}$ in the $N=8$ neutron-rich nucleus $^{13}\mathrm{B}$, referred to as the $d$-wave neutron excitation state. Several states at excitation energies of 3.6(1), 4.2(1), 5.4(2), and 6.5(2) MeV in $^{13}\mathrm{B}$ were observed in its excitation energy spectra, which were derived from the energies and angles of the scattered deuterons from $^{13}\mathrm{B}$ using the missing mass method. To determine the parity of each populated state, the inelastic scattering differential cross sections (DCSs) were compared to the distorted wave Born approximation (DWBA) calculations. The 5.4- and 6.5-MeV states were inferred to be positive parity states and considered as potential candidates for the missing $d$-wave neutron excitation state. The gap between $s$ and $d$ shells in $^{13}\mathrm{B}$ and the systematic behavior of neutron-rich Boron isotopes were also investigated based on the experimental findings.

Ce résumé expose les affirmations des auteurs. BNTIC ne l’interprète pas comme une validation indépendante des résultats.