Physics – Nuclear Physics – Nuclear Theory
Scientific paper
1998-04-29
Phys.Rev.C58:295-306,1998
Physics
Nuclear Physics
Nuclear Theory
29 pages, ReVTeX, 11 postscript figures, submitted to Phys.Rev.C
Scientific paper
10.1103/PhysRevC.58.295
The correct use of energy-dependent single-particle level (s.p.l.) densities within particle-hole state densities based on the equidistant spacing model (ESM) is analysed. First, an analytical expression is obtained following the convolution of energy-dependent excited-particle and hole densities. Next, a comparison is made with results of the ESM formula using average s.p.l. densities for the excited particles and holes, respectively. The Fermi-gas model (FGM) s.p.l. densities calculated at the corresponding average excitation energies are used in both cases. The analysis concerns also the density of particle-hole bound states. The pairing correlations are taken into account while the comparison of various effects includes the exact correction for the Pauli exclusion principle. Quantum-mechanical s.p.l. densities and the continuum effect can also match a corresponding FGM formula, suitable for use within the average energy-dependent partial state density in multistep reaction models.
Avrigeanu M.
Avrigeanu V.
Harangozo A.
Stetcu Ionel
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