STELLAR CROSS-SECTIONS FOR S-33(N,ALPHA)SI-30, CL-36(N,P)S-36, AND CL-36(N,ALPHA)P-33 AND THE ORIGIN OF S-36

The cross section of the S33(n,α)30Si reaction was measured in a neutron energy spectrum yielding the stellar rate for a thermal energy of kT=25 keV. For the Cl36(n,p)36S reaction, the experiment was performed in the neutron energy range from 10 to 260 keV. Our new result for S33 resolves the problem of a large discrepancy between two previous experiments. In case of Cl36 it could be shown that the (n,α) channel is negligibly small compared to the (n,p) reaction at s-process conditions. The present results are used for a detailed discussion of a possble s-process origin of the rare neutron-rich isotope S36. © 1995 The American Physical Society.