New shell model calculations forAr40based on recentg-factor and lifetime measurements

Abstract

We have redetermined the $g$ factor and the lifetime of the ${2}_{1}^{+}$ state in $^{40}\mathrm{Ar}$ by applying the technique of \ensuremath{\alpha} transfer from a carbon target to $^{36}\mathrm{S}$ beams in inverse kinematics combined with transient magnetic fields. In addition, the lifetimes of the ${4}_{1}^{+}$ and the ${2}_{2}^{+}$ states in $^{40}\mathrm{Ar}$ have been remeasured using the Doppler-shift-attenuation method (DSAM). Additional experimental details of the \ensuremath{\alpha}-transfer measurements are provided. The results are discussed within the framework of new large-scale shell model calculations with both free and effective nucleon $g$ factors.