Nuclear collective states at finite temperature

Abstract

The Energy Density Method (EDM) has been used to study low-lying nuclear collective states as well as isoscalar giant resonances at finite temperature (T). Giant states have been studied by computing the corresponding strength function moments (sum rules) in the Random-Phase Approximation (RPA). For the description of the low lying states we have resorted to a variety of models from the rather sophisticated RPA method to liquid drop and schematic models. It has been found that low lying states are most affected by thermal effects, giant resonances being little affected in the range of temperatures here studied.

High temperature giant dipole and isoscalar resonances

“…1 for T<3 MeV are in agreement with previous calculations in which the continuum was not considered [6,23,[27][28][29]. 1 for T<3 MeV are in agreement with previous calculations in which the continuum was not considered [6,23,[27][28][29].…”

“…Isoscalar resonances at T= 0 were already studied with the sum rules technique [23, 28,29,31], and more recently, up to high temperatures with the subtraction procedure [16]. Here, we present a more systematic study than the one carried out in 1-163.…”