Tensor Effects in Dipole Excitations at Finite Temperature

Abstract

Tensor e ects in the dipole excitation of neutron-rich Ni nucleus are investigated in the framework of Skyrme Hartree Fock plus random phase approximation at nite temperature. We calculate isovector giant and pygmy dipole strengths with nite temperature random phase approximation by using di erent tensor correlations. The e ect of both tensor and nite temperature on the giant dipole resonance pygmy dipole resonance energy region is analysed. Pygmy dipole resonance calculations with di erent proton neutron tensor coupling constants are also compared with the experimental results.