Resonant and average behavior of the C12+C12 total reaction cross section: 5.6≤Ec.m.≤10.0 MeV

Abstract

The gamma-radiation yields from the C12+C12 interaction were measured in steps of 50 keV over the bombarding energy range 11.8≤Elab≤20 MeV in order to study the energy dependence of the total reaction cross section. Several new resonances, occurring at Ec.m.=6.49,7.30,7.45,9.33,and9.67 MeV, were identified in these yields. Carbon partial widths were determined for a number of resonances, and these widths demonstrate the quasimolecular nature of the corresponding structures. The average or background trend of the energy dependence of the reaction cross section was found to be adequately described by an incoming-waves boundary condition model, however, and no evidence was found in the energy-averaged yields for anomalous absorption in the C12+C12 system. NUCLEAR REACTIONS C12(C12,γ), E=11.8-20.0 MeV; measured σ(E), deduced total C12+C12 reaction cross section. Located five new narrow resonances. Measured total widths, estimated carbon partial widths of resonances. Optical model analysis of σReact, using incoming-wave boundary condition model. © 1980 The American Physical Society.