Lifetime measurement of the first excited state in S37

Abstract

Lifetime of the $3/{2}^{\ensuremath{-}}$ first excited state in $^{37}\mathrm{S}$ populated by the ${\ensuremath{\beta}}^{\ensuremath{-}}$ decay of $^{37}\mathrm{P}$ has been measured using $\ensuremath{\beta}\ensuremath{-}\ensuremath{\gamma}$ delayed coincidence technique. The $B(E2;7/{2}^{\ensuremath{-}}\ensuremath{\rightarrow}3/{2}^{\ensuremath{-}})$ value in $^{37}\mathrm{S}$ deduced from the lifetime comes close to the $B(E2;{0}^{+}\ensuremath{\rightarrow}{2}_{1}^{+})$ value in weakly deformed $^{38}\mathrm{S}$ but deviates significantly from that in spherical $^{36}\mathrm{S}$. This manifests that $^{37}\mathrm{S}$ is a weakly deformed rather than spherical nucleus.