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Hypernuclear structure with the new Nijmegen potentials
Vidaña Haro, Isaac; Polls Martí, Artur; Ramos Gómez, Àngels; Schulze, H.-J.
Universitat de Barcelona
Information on level density for nuclei with mass numbers A?20250 is deduced from discrete low-lying levels and neutron resonance data. The odd-mass nuclei exhibit in general 47 times the level density found for their neighboring even-even nuclei at the same excitation energy. This excess corresponds to an entropy of ?1.7kB for the odd particle. The value is approximately constant for all midshell nuclei and for all ground state spins. For these nuclei it is argued that the entropy scales with the number of particles not coupled in Cooper pairs. A simple model based on the canonical ensemble theory accounts qualitatively for the observed properties.
04-05-2010
Estructura nuclear
Mecànica estadística
Nuclear structure
Statistical mechanics
(c) The American Physical Society, 2001
Artículo
The American Physical Society
         

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