First measurement of the 33Cl(p,α)30S reaction

The ${}^{30}$S($\ensuremath{\alpha},\phantom{\rule{-0.16em}{0ex}}p$)${}^{33}$Cl reaction may have a significant impact on final elemental abundances and energy output of type I X-ray bursts, as well as influencing observables such as double-peaked luminosity profiles, because it could bypass the ${}^{30}$S waiting point. This reaction has been studied experimentally for the first time in inverse kinematics via the time-inverse reaction ${}^{1}$H(${}^{33}$Cl,${}^{30}$S)$\ensuremath{\alpha}$ with a ${}^{33}$Cl radioactive ion beam produced at the Argonne Tandem Linac Accelerator System facility by the ``in-flight'' technique. This reaction was studied at three different beam energies. The experimental method used and the resulting data are discussed.