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Level density parameter of nuclei at finite temperature
Grégoire C., Kuo T.T.S., Stout D.B.
Nuclear Physics A 530 (1991) 94-110 - http://hal.in2p3.fr/in2p3-00695573
Physique/Physique Nucléaire Théorique
Level density parameter of nuclei at finite temperature
C. Grégoire1, T.T.S. Kuo, D.B. Stout
1 :  GANIL - Grand Accélérateur National d'Ions Lourds
Bvd Henri Becquerel - BP 55027 - 14076 CAEN CEDEX 5
The contribution of particle-particle (hole-hole) and of particle-hole ring diagrams to the nuclear level-density parameter at finite temperature is calculated. We first derive the correlated grand potential with the above ring diagrams included to all orders by way of a finite temperature RPA equation. An expression for the correlated level-density parameter is then obtained by differentiating the grand potential. Results obtained for the 40Ca nucleus with realistic matrix elements derived from the Paris potential are presented. The contribution of the RPA correlations is found to be important, being significantly larger than typical Hartree-Fock results. The temperature dependence of the level-density parameter derived in the present work is generally similar to that obtained in a schematic model. Comparison with available experimental data is discussed.

Articles dans des revues avec comité de lecture
Nuclear Physics A (Nucl. Phys. A)
Publisher Elsevier
ISSN 0375-9474