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

Grimes, S. M.; Voinov, A. V.; Massey, T. N.

doi:10.1103/PhysRevC.94.014308

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

Journal Article · Tue Jul 12 00:00:00 EDT 2016 · Physical Review C

DOI:https://doi.org/10.1103/PhysRevC.94.014308· OSTI ID:1338916

Grimes, S. M. ^[1]; Voinov, A. V. ^[1]; Massey, T. N. ^[1]

Ohio Univ., Athens, OH (United States)

Here, the spin cutoff parameter determining the nuclear level density spin distribution ρ(J) is defined through the spin projection as < J²_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.

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Research Organization:: Ohio Univ., Athens, OH (United States)

Sponsoring Organization:: USDOE National Nuclear Security Administration (NNSA)

Grant/Contract Number:: NA0002905; FG02-88ER40387

OSTI ID:: 1338916

Alternate ID(s):: OSTI ID: 1261697

Journal Information:: Physical Review C, Vol. 94, Issue 1; ISSN 2469-9985

Publisher:: APSCopyright Statement

Country of Publication:: United States

Language:: English

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Cited by: 9 works

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nuclear level density
spin cutoff parameter

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

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