Elsevier

Physics Letters B

Volume 262, Issue 1, 13 June 1991, Pages 1-5
Physics Letters B

Level density parameter behaviour at high excitation energy

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Abstract

We present a formalism to calculate the intrinsic (without collective effects) and effective (with collective effects) level density parameters over a wide range of excitation energy up to 180 MeV. The behaviour of aint and aeff as an energy function is shown for several typical nuclei (115Cd, 129Te, 148Pm, 173Yb, 192Ir and 248Cm). Moreover, local systematics of the parameter aeff as a function of the neutron number N, also for nuclei extremely far from the β-line, is shown for some typical nuclei (Rb, Pd, Sn, Ba and Hg) at excitation energies of 15, 80 and 150 MeV.

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This work was supported in part by the Istituto Nazionale di Fisica Nucleare, Ministero dell'Universitá e della Ricerca Scientifica e Technologica and Comitato Regionale di Ricerche Nucleari.

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