The Effects of Secondary Composite Particle Formation in the (γ, γ' b) and (a,b γ') Reactions

In this article a study of the effect of secondary composite particle formation on the spectrum of γ’ quanta in (γ, γ 'b) and (a , b γ') reactions is given. The contributions of the statistical multistep direct and compound processes to the cross sections of these reactions are calculated. It is shown that the spectrum of promptly emitted γ ' quanta exhibits narrow lines when the reactions investigated are dominated by the multistep direct process. The energies of these γ lines are characteristic to the structure of the emitted secondary composite particle b. On the other hand, when the reaction is dominated by the multistep compound process, no significant γ lines can be expected above the continuous background produced by radiative transitions between the different exciton configurations of the compound nucleus