$^{32}{\rm S}(p,\gamma)$ and its relevance to calibrating a $^{33}{\rm Ar}$ beta-delayed proton spectrum

Bounds on scalar contributions to the weak-interaction have been obtained from a measurement of the $^{32}{\rm Ar}$ $e^+ - \nu$ correlation which is determined from the shape of the beta-delayed proton spectrum.\footnote{E.~G.~Adelberger {\it et al}, Phys. Rev. Lett, {\bf 83}, 1299 (1999)} The proton-energy calibration plays an important role and is obtained using delayed proton groups from $^{33}{\rm Ar}$ corresponding to resonances in $^{32}{\rm S}(p,\gamma)$. In order to check for potential systematic effects and to improve the precision of the above experiment we have performed a high precision measurement of excitation energies of the relevant states corresponding to $^{32}{\rm S}(p,\gamma)$ resonances. We also measured the relative gamma branches and width of the second $J^\pi = 3/2^+$ excited state in $^{33}{\rm Cl}$. The relative gamma branches are in significant disagreement with a previous measurement\footnote{M.~M.~Aleonard {\it et al}, Nucl. Phys. {\bf A 257}, 490 (1976)}. Using our value for the width we are able to resolve an apparent discrepancy.