We have calculated the ${}_{}{}^{26}{}_{}{}^{}\mathrm{Al}$(n,p${)}^{26}$Mg reaction rate using an exact expression for the compound-nucleus cross section derived recently by Verbaarschot et al. This reaction is astrophysically important, and it happens to fall in a kinematic regime where the exact expression is expected to yield large deviations from the standard Hauser-Feshbach formula. We find that the exact statistical cross section is 20% lower at energies greater than 300 keV, and drops to 40% lower at 0 energy but still does not describe the available data. These deviations are quite similar to those predicted by the formula of Tepel et al.

• Received 26 December 1985

DOI:https://doi.org/10.1103/PhysRevC.33.2197