Dipole photon strength functions from neutron induced reactions

Abstract

It will be reviewed a current status of theoretical and phenomenological approaches to investigation of dipole photon strength functions. The model of electric dipole photon strength functions (EDPSF) depending on the temperature of gamma-transition final state is compared with the phenomenological EDPSFs recently obtained by various methods. Special accent is put on the results derived by a "model-less" analysis of two-step gamma decay of compound-states created after thermal neutron capture by heavy nuclei. The conclusion on the dependence of these strength functions on characteristic of final states is made. A necessity for development of the consistent theoretical approach for description the dipole strength functions in the case of deformed nuclei is discussed.