Level densities and thermodynamical properties of Pt and Au isotopes

F. Giacoppo, F. L. Bello Garrote, L. A. Bernstein, D. L. Bleuel, T. K. Eriksen, R. B. Firestone, A. Görgen, M. Guttormsen, T. W. Hagen, B. V. Kheswa, M. Klintefjord, P. E. Koehler, A. C. Larsen, H. T. Nyhus, T. Renstrøm, E. Sahin, S. Siem, T. Tornyi

Research output: Contribution to journalArticlepeer-review

14 Citations (Scopus)


The nuclear level densities of Pt194-196 and Au197,198 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=1.9kB and 1.1kB is observed in Pt195 and Au198 with respect to Pt196 and Au197, 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.

Original languageEnglish
Article number054330
JournalPhysical Review C - Nuclear Physics
Issue number5
Publication statusPublished - 20 Nov 2014
Externally publishedYes

ASJC Scopus subject areas

  • Nuclear and High Energy Physics


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