The Skyrme-TQRPA calculations of electron capture on hot nuclei in pre-supernova environment

Abstract

We combine the thermal QRPA approach with the Skyrme energy density functional theory (Skyrme-TQRPA) for modelling the process of electron capture on nuclei in supernova environment. For a sample nucleus, ${}^{56}$Fe, the Skyrme-TQRPA approach is applied to analyze thermal effects on the strength function of GT${}_{+}$ transitions which dominate electron capture at $E_e\le 30$~MeV. Several Skyrme interactions are used in order to verify the sensitivity of the obtained results to the Skyrme force parameters. Finite-temperature cross sections are calculated and the results are compared with those of the other model calculations.

Comments: 4 figures. arXiv admin note: text overlap with arXiv:1602.07869