Thermonuclear 42Ti(p,gamma)43V rate in type I X-ray bursts

Abstract

The thermonuclear rate of the ${}^{42}$Ti($p$,$\gamma$)${}^{43}$V reaction has been reevaluated based on a recent precise proton separation energy measurement of $S_p$(${}^{43}$V)=83$\pm$43 keV. The astrophysical impact of our new rates has been investigated through one-zone postprocessing type I x-ray burst calculations. It shows that the new experimental value of $S_p$ significantly affects the yields of species between A$\approx$40--45. As well, the precision of the recent experimental $S_p$ value constrains these yields to better than a factor of three.

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• Improved thermonuclear rate of ${}^{42}$Ti($p$,$\gamma$)${}^{43}$V and its astrophysical implication in rp-process
• New ${}^{63}$Ga(p,$\gamma$)${}^{64}$Ge and ${}^{64}$Ge(p,$\gamma$)${}^{65}$As reaction rates corresponding to the temperature regime of thermonuclear X-ray bursts
• Reevaluation of thermonuclear reaction rate of 50Fe(p,gamma)51Co