EXPLOSIVE HYDROGEN BURNING OF CL-35

Proton threshold states in Ar-36 have been studied via the reactions C l-35(He-3, d)Ar-36, S-32(Li-6, d)Ar-36, S-32(alpha, gamma)Ar-36, Cl-35 (p, gamma)Ar-36 and Cl-35(p, alpha)S-32 to investigate their influence on a possible SCl reaction cycle in explosive hydrogen burning. Three new states in Ar-36 have been observed in the (He-3, d) reaction at E (x) = 8806, 8887 and 8923 keV. Deuteron angular distributions were mea sured for 14 states near the Cl-35 + p threshold and were analyzed wit h DWBA calculations. Values of transferred orbital angular momenta, sp ectroscopic factors and proton partial widths were determined.: Gamma- ray spectra have been measured at ten (p, gamma) resonances. Three new resonances were observed at E(R) = 311, 416 and 627 keV, correspondin g to Ar-36 states at E(x) = 8806, 8909 and 9117 keV, respectively. Exc itation and resonance energies, gamma-ray branching ratios and resonan ce strengths are presented. The astrophysical implications of our resu lts for explosive hydrogen burning of Cl-35 are discussed.