Temperature generalization of the quasiparticle random-phase approximation with allowance for a continuum

Abstract

The method developed previously by the present authors on the basis of the quasiparticle random-phase approximation with allowance for a single-particle continuum is generalized to the case of finite temperatures and is implemented numerically for the isovector E1 resonance in the nuclei of even tin isotopes—specifically, in the stable nucleus 120Sn and in the unstable nucleus 104Sn. The temperature dependence of the integrated features of the resonance and the temperature dependence of its envelope are discussed.