GUTTORMSEN, M.; JURADO, B.; WILSON, J. N.; AICHE, M.; BERNSTEIN, L. A.; DUCASSE, Q.; GIACOPPO, F.; GOERGEN, A.; GUNSING, F.; HAGEN, T. W.; LARSEN, A. C.; LEBOIS, M.; LENIAU, B.; RENSTROEM, T.; ROSE, S. J.; SIEM, S.; TORNYI, T.; TVETEN, G. M.; WIEDEKING, M.

doi:10.1103/PhysRevC.88.024307

Metadatos

Mostrar el registro completo del ítem

Licencia de uso del documento

GUTTORMSEN, M.

JURADO, B.
Aval du cycle et Energie Nucléaire [ACEN]

WILSON, J. N.

Idioma

Article de revue

Este ítem está publicado en

Physical Review C. 2013, vol. 88, p. 024307

American Physical Society

Resumen en inglés

Particle-gamma coincidences have been measured to obtain gamma-ray spectra as a function of excitation energy for 231-233Th and 237-239U. The level densities, which were extracted using the Oslo method, show a constant temperature behavior. The isotopes display very similar temperatures in the quasi-continuum, however, the even-odd isotopes reveal a constant entropy increase Delta S compared to their even-even neighbors. The entropy excess depends on available orbitals for the last unpaired valence neutron of the heated nuclear system. Also, experimental microcanonical temperature and heat capacity have been extracted. Several poles in the heat capacity curve support the idea that an almost continuous melting of Cooper pairs is responsible for the constant-temperature behavior.< Leer menos

Metadatos

Licencia de uso del documento

Constant-temperature level densities in the quasi-continuum of Th and U isotopes

Idioma

Este ítem está publicado en

Resumen en inglés

DOI

Orígen

Centros de investigación