Level densities and thermodynamical properties of Pt and Au isotopes

2014/08/31 by F. Giacoppo, F. L. Bello Garrote, L. A. Bernstein +15 · 1 citation
Physics and Astronomy · #nucl-ex #nucl-th

paper · pdf · doi:10.1103/physrevc.90.054330

arxiv created 2014/11/28 · arxiv updated 2016/08/10

Abstract

The nuclear level densities of ^194-196Pt and ^197,198Au below the neutron separation energy have been measured using transfer and scattering reactions. All the level density distributions follow the constant-temperature description. Each group of isotopes is characterized by the same temperature above the energy threshold corresponding to the breaking of the first Cooper pair. A constant entropy excess ΔS=1.9 and 1.1 k_B is observed in ¹⁹⁵Pt and ¹⁹⁸Au with respect to ¹⁹⁶Pt and ¹⁹⁷Au, respectively, giving information on the available single-particle level space for the last unpaired valence neutron. The breaking of nucleon Cooper pairs is revealed by sequential peaks in the microcanonical caloric curve.

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• Microscopic Statistical Calculation of Nuclear Level Density Based on Relativistic Density Functional Theory

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