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Shell energy and the level-density parameter of hot nuclei

Abstract : Macroscopic-microscopic calculations have been performed with the Yukawa folded mean field for 134 spherical even-even nuclei and 6 deformed ones at temperatures $0 \le T \le 5$ MeV and elongations ranging from oblate shapes to the scission configuration of fissioning nuclei. The Strutinsky type free-energy shell corrections for this sample of nuclei and their temperature and deformation dependence are found by a folding procedure in particle-number space. The average dependence of the single-particle level-density parameter on mass number A and isospin I is determined and compared with previous estimates obtained using the relativistic mean-field theory, the Hartree-Fock approximation with the Skyrme effective interaction, and the phenomenological Thomas-Fermi approach adjusted to experimental data. The estimates for the level-density parameter obtained for different deformations are fitted by a liquid-drop type expression.
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http://hal.in2p3.fr/in2p3-00109005
Contributor : Béatrice Forrler <>
Submitted on : Wednesday, October 25, 2006 - 2:16:26 PM
Last modification on : Friday, May 8, 2020 - 1:09:42 AM

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B. Nerlo-Pomorska, K. Pomorski, J. Bartel. Shell energy and the level-density parameter of hot nuclei. Physical Review C, American Physical Society, 2006, 74, pp.034327. ⟨10.1103/PhysRevC.74.034327⟩. ⟨in2p3-00109005⟩

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