Si^{28} (He^{4},O^{16})O^{16} Reaction
Abstract
Cross sections and angular distributions have been measured for Si^{28} (He^{4},O^{16})O^{16} reaction leading to the ground state and to several of the excited states of one of the product nuclei. The reaction where both product nuclei are left in excited states has also been observed. The differential cross sections are quite small, of the order of 1 μb/sr. The reaction products were identified by simultaneous detection and twodimensional analysis of both reaction products. The results are discussed in terms of the statistical theory of compound nuclear reactions. The observed angular distribution is consistent with the expectation that only the compound states with the highest available angular momentum (J~14) contribute to the exit channel where both O^{16} product nuclei are in their ground state. A statisticalmodel analysis of the absolute cross sections yields a value for the level density parameter a of (0.15+/0.02)A for mass numbers A in the region of 2831. Deviations in the relative yields from that predicted by statistical theory are discussed in terms of possible shellstructure effects on nuclear deformabilities.
 Publication:

Physical Review
 Pub Date:
 June 1967
 DOI:
 10.1103/PhysRev.158.887
 Bibcode:
 1967PhRv..158..887V