Tensor Effects in Dipole Excitations at Finite Temperature

Abstract

Tensor eects in the dipole excitation of neutron-rich 68 Ni nucleus are investigated in the framework of Skyrme HartreeFock plus random phase approximation at nite temperature. We calculate isovector giant and pygmy dipole strengths with nite temperature random phase approximation by using dierent tensor correlations. The eect of both tensor and nite temperature on the giant dipole resonancepygmy dipole resonance energy region is analysed. Pygmy dipole resonance calculations with dierent protonneutron tensor coupling constants are also compared with the experimental results.