  The thermonuclear rate of the 50Fe(p,gamma)51Co reaction in the Type I X-ray
bursts (XRBs) temperature range has been reevaluated based on a recent precise
mass measurement at CSRe lanzhou, where the proton separation energy
Sp=142+/-77 keV has been determined firstly for the 51Co nucleus. Comparing to
the previous theoretical predictions, the experimental Sp value has much
smaller uncertainty. Based on the nuclear shell model and mirror nuclear
structure information, we have calculated two sets of thermonuclear rates for
the 50Fe(p,gamma)51Co reaction by utilizing the experimental Sp value. It shows
that the statistical-model calculations are not ideally applicable for this
reaction primarily because of the low density of low-lying excited states in
51Co. In this work, we recommend that a set of new reaction rate based on the
mirror structure of 51Cr should be incorporated in the future astrophysical
network calculations.
