Proton capture on 30P in novae: On the existence of states at 6.40 MeV and 6.65 MeV in 31S
Abstract
We use a high resolution 32 S(d,t) measurement to investigate the claimed existence of a 6401(3) keV state in 31S that may affect the 30 P(p,γ) 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 P(p,γ) 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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