On a semimicroscopic description of extremely simple photonuclear reactions involving the excitation of a giant dipole resonance

Abstract

A quantitative interpretation of basic properties of a giant dipole resonance is proposed within a semimicroscopic approach relying on the random-phase approximation that takes exactly into account a single-particle continuum and on a phenomenological description of the fragmentation effect. For some magic and semimagic nuclei, the calculated photoabsorption cross sections and cross sections for partial photoneutron “direct + semidirect” reactions in the vicinity of the above resonance are compared with their experimental counterparts.