On 12C(g, N)11B reaction mechanism in the intermediate energy range

The experimental research results for two reactions of photodisintegration of a carbon nucleus which proceed with the knocking out the nucleons from different shells are considered. The total cross-section dependence with respect to energy and dependence of expansion coefficients of the nucleon angle distributions by trigonometric functions on energy are compared. Both reactions have dependence non-regularities within the 34...44 MeV energy interval, it can be explained as a change of mechanism the nucleus absorbs a photon. It is shown that a joining of the quasideuteron mechanism has a identical energy threshold if nucleons are detached from the different shells of a carbon nucleus.