High-spin states inCl37

Abstract

The deexcitation of high-spin states in $^{37}\mathrm{Cl}$ was studied via the $^{27}\mathrm{Al}(^{19}\mathrm{F}, 2\ensuremath{\alpha}p)$, $^{27}\mathrm{Al}(^{12}\mathrm{C}, 2p)$, and $^{34}\mathrm{S}(\ensuremath{\alpha}, p)$ reactions. The decay scheme and spin assignments were deduced from $p\ensuremath{-}\ensuremath{\gamma}$ coincidences, $\ensuremath{\gamma}$-ray angular distributions, directional correlation from oriented nuclei ratios, and excitation function measurements. The lifetime of a new yrast level at 7020 keV ($J=\frac{15}{2}$) was determined in a recoil distance experiment. New levels are reported at 6001 keV ($J=\frac{9}{2}\ensuremath{-}\frac{13}{2}$) and at 8177 keV. The observed levels are compared to the predictions of the weak-coupling model.NUCLEAR REACTIONS $^{34}\mathrm{S}(\ensuremath{\alpha}, p\ensuremath{\gamma})$, $E=16\ensuremath{-}22$ MeV, measured $p\ensuremath{-}\ensuremath{\gamma}$, $\ensuremath{\gamma}\ensuremath{-}\ensuremath{\gamma}$ coin and DCO ratios; $^{27}\mathrm{Al}(^{19}\mathrm{F}, 2\ensuremath{\alpha}p)$, $E=45\ensuremath{-}80$ MeV and $^{27}\mathrm{Al}(^{12}\mathrm{C}, 2p)$, $E=40$ MeV; measured $\ensuremath{\gamma}\ensuremath{-}\ensuremath{\gamma}$ coin, $\ensuremath{\sigma}({E}_{\ensuremath{\gamma}}, \ensuremath{\theta})$. $^{37}\mathrm{Cl}$ deduced levels, $J$. Measured RDM, deduced $\ensuremath{\tau}$. Enriched $^{34}\mathrm{S}$ targets; Ge(Li) detectors and Si telescope. Comparison with theoretical weak-coupling model.