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

Abstract

The thermonuclear rate of the ${}^{42}$Ti($p$,${\hat{I}}^3$)${}^{43}$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.