ИСТИНА

Thermal effects on the electron capture and beta-decays rates are studied for 56Ni embedded in dense and hot matter of the collapsing core of a massive star. The influence of temperature on the strength distributions of GT transitions is considered in the framework of the Skyrme-TQRPA model. It is shown that thermal effects make possible negative- and low-energy GT transitions which are Pauli blocked at zero temperature. The obtained weak-interaction rates are compared with those from the large-scale shell model calculations.