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.

References in corpus (5)

• Benchmarking ${}^{136}$Xe Neutrinoless $\beta \beta$ Decay Matrix Element Calculations with the ${}^{138}\mathrm{Ba}(p,t)$ Reaction
• Constraining the ${}^{30}$P($p,\gamma {)}^{31}$S reaction rate in ONe novae via the weak, low-energy, $\beta$-delayed proton decay of ${}^{31}$Cl
• Investigation of pair-correlated $0^{+}$ states in ${}^{134}$Ba via the ${}^{136}$Ba($p,t$) reaction
• Spectroscopy of states in ${}^{136}\mathrm{Ba}$ using the ${}^{138}\mathrm{Ba}(\mathrm{p},\mathrm{t})$ reaction
• Isospin Mixing and the Cubic Isobaric Multiplet Mass Equation in the Lowest T = 2, A = 32 Quintet

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