Possible evidence of nonstatistical properties in the ^{35}Cl(n, p)^{35}S cross section

The $^{35}\mathrm{Cl}(n,p)$ and $^{35}\mathrm{Cl}(n,\ensuremath{\alpha})$ cross sections at incident neutron energies between 2.42 and 2.74 MeV were measured using the Berkeley High Flux Neutron Generator. The cross sections for $^{35}\mathrm{Cl}(n,p)$ were more than a factor of 3 to 5 less than all of the values in the neutron absorption data libraries, while the $^{35}\mathrm{Cl}(n,\ensuremath{\alpha})$ cross sections are in reasonable agreement with the data libraries. The measured energy-differential cross section is consistent with a single resonance with a width of 293(46) keV. This result suggests that, despite the high incident neutron energy, any attempt to model $(n,x)$ cross sections in the vicinity of the $N=Z=20$ shell gap requires a resolved resonance approach rather than a Hauser-Feshbach approach.