Hindered Proton Collectivity in S121628 : Possible Magic Number at Z=16

Le résumé fourni par la source

The reduced transition probability $B(E2;{0}_{gs}^{+}\ensuremath{\rightarrow}{2}_{1}^{+})$ for $^{28}\mathrm{S}$ was obtained experimentally using Coulomb excitation at $53\text{ }\text{ }\mathrm{MeV}/\mathrm{nucleon}$. The resultant $B(E2)$ value $181(31)\text{ }\text{ }{e}^{2}{\mathrm{fm}}^{4}$ is smaller than the expectation based on empirical $B(E2)$ systematics. The double ratio $|{M}_{n}/{M}_{p}|/(N/Z)$ of the ${0}_{gs}^{+}\ensuremath{\rightarrow}{2}_{1}^{+}$ transition in $^{28}\mathrm{S}$ was determined to be 1.9(2) by evaluating the ${M}_{n}$ value from the known $B(E2)$ value of the mirror nucleus $^{28}\mathrm{Mg}$, showing the hindrance of proton collectivity relative to that of neutrons. These results indicate the emergence of the magic number $Z=16$ in the $|{T}_{z}|=2$ nucleus $^{28}\mathrm{S}$.

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