Role of Quasiparticle X Phonon Components in gamma-Decay of High-Lying States

摘要

In the framework of quasiparticle-phonon model of a nucleus the probabilities of gamma-transitions (E1, M1, E2) from a high-lying resonance-similar structure to the excitation of neutron hole state (lg sub 9 2/) sup -1 of sup 111 Sn nucleus to the main and low-excited one-quasiparticle states have been calculated. Wave function of a highly excited state comprised the components quasiparticle x phonon and quasiparticle x two phonons. For E1-transitions 9/2 sup + -> 11/2 sub 1- the main contribution to the transition is made by one-quasiparticle components of wave functions of the initial and final states. E2-transition 9/2 sup + -> 7/2/sub g,s/ sup + takes place at the expense of impurities in quasiparticle x phonon states. For M1-transition from the states 9/2 sup + to the main one a strong destructive interference of contributions of one-quasiparticle and quasiparticle x phonon components is observed. Thus it is shown that components quasiparticle x phonon may play the major role in correct description of gamma-transitions from high-lying one-particle or low-lying hole states. 11 references, 2 figures. (ERA citation 12:048946)