Proton capture on ${}^{30}$P in novae: On the existence of states at $6.40$ MeV and $6.65$ MeV in ${}^{31}$S

Abstract

We use a high resolution ${}^{32}\mathrm{S}(d,t)$ measurement to investigate the claimed existence of a 6401(3) keV state in ${}^{31}$S that may affect the ${}^{30}\mathrm{P}(p,\gamma )$ nuclear reaction rate in oxygen-neon (ONe) novae. Our data are shown to exclude the null hypothesis - that the state does not exist - with high significance. Additionally, the data also suggest the existence of a hitherto unreported state at 6648(4) keV. This state corresponds to a ${}^{30}\mathrm{P}(p,\gamma )$ resonance at $517(4)$ keV, located below the higher edge of the Gamow window for peak nova temperatures of about 0.4 GK.

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Cited by in corpus (1)

• ${}^{138}\mathrm{Ba}(d,\alpha )$ study of states in ${}^{136}\mathrm{Cs}$: Implications for new physics searches with xenon detectors