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Title: Mass-number and excitation-energy dependence of the spin cutoff parameter

Here, the spin cutoff parameter determining the nuclear level density spin distribution ρ(J) is defined through the spin projection as < J 2 z > 1/2 or equivalently for spherical nuclei, (< J(J+1) >/3) 1/2. It is needed to divide the total level density into levels as a function of J. To obtain the total level density at the neutron binding energy from the s-wave resonance count, the spin cutoff parameter is also needed. The spin cutoff parameter has been calculated as a function of excitation energy and mass with a super-conducting Hamiltonian. Calculations have been compared with two commonly used semiempirical formulas. A need for further measurements is also observed. Some complications for deformed nuclei are discussed. The quality of spin cut off parameter data derived from isomeric ratio measurement is examined.
 [1] ;  [1] ;  [1]
  1. Ohio Univ., Athens, OH (United States)
Publication Date:
Grant/Contract Number:
NA0002905; FG02-88ER40387
Accepted Manuscript
Journal Name:
Physical Review C
Additional Journal Information:
Journal Volume: 94; Journal Issue: 1; Journal ID: ISSN 2469-9985
Research Org:
Ohio Univ., Athens, OH (United States)
Sponsoring Org:
USDOE National Nuclear Security Administration (NNSA)
Country of Publication:
United States
73 NUCLEAR PHYSICS AND RADIATION PHYSICS; nuclear level density; spin cutoff parameter
OSTI Identifier:
Alternate Identifier(s):
OSTI ID: 1261697