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Surface-layer corrections to the level-density formula for a diffuse Fermi gas

1981
10 pages
Published in:
  • Nucl.Phys.A 372 (1981) 141-150
  • Published: 1981
DOI:
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Abstract: (Elsevier)
Using the Thomas-Fermi treatment and the leptodermous expansion in powers of A − 1 3 , we derive a formula for the nuclear level-density parameter a , which corrects the conventional expression for the presence of the diffuse surface region. This appears to remove the discrepancy (of about a factor of 1.7) between the empirical values of a A and those that would follow from considering the nucleus to be a simple Fermi gas at constant (bulk) density.