Unexpected properties of the 33S(α,p)36CI reaction cross section at low energies.

New experimental data for the 33S(α,p)36CI reaction show a very unusual energy dependence. Contrary to common findings for many other «-induced reactions, statistical model calculations underestimate the measured cross sections at very low energies. The relatively huge cross sections at these low energies require a significant amount of single-particle strength in the measured energy range which exceeds, by far, 100% as soon as the additional strength from the competing 33S(α,p)36CI reaction is taken into account. In addition, the new data deviate from a general trend for the energy dependence of a-induced reaction cross sections. [ABSTRACT FROM AUTHOR]