Mass-number and excitation-energy dependence of the spin cutoff parameter
Abstract
Here, the spin cutoff parameter determining the nuclear level density spin distribution ρ(J) is defined through the spin projection as < J2z > 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.
- Authors:
-
- Ohio Univ., Athens, OH (United States)
- Publication Date:
- Research Org.:
- Ohio Univ., Athens, OH (United States)
- Sponsoring Org.:
- USDOE National Nuclear Security Administration (NNSA)
- OSTI Identifier:
- 1338916
- Alternate Identifier(s):
- OSTI ID: 1261697
- Grant/Contract Number:
- NA0002905; FG02-88ER40387
- Resource Type:
- Accepted Manuscript
- Journal Name:
- Physical Review C
- Additional Journal Information:
- Journal Volume: 94; Journal Issue: 1; Journal ID: ISSN 2469-9985
- Publisher:
- APS
- Country of Publication:
- United States
- Language:
- English
- Subject:
- 73 NUCLEAR PHYSICS AND RADIATION PHYSICS; nuclear level density; spin cutoff parameter
Citation Formats
Grimes, S. M., Voinov, A. V., and Massey, T. N. Mass-number and excitation-energy dependence of the spin cutoff parameter. United States: N. p., 2016.
Web. doi:10.1103/PhysRevC.94.014308.
Grimes, S. M., Voinov, A. V., & Massey, T. N. Mass-number and excitation-energy dependence of the spin cutoff parameter. United States. https://doi.org/10.1103/PhysRevC.94.014308
Grimes, S. M., Voinov, A. V., and Massey, T. N. Tue .
"Mass-number and excitation-energy dependence of the spin cutoff parameter". United States. https://doi.org/10.1103/PhysRevC.94.014308. https://www.osti.gov/servlets/purl/1338916.
@article{osti_1338916,
title = {Mass-number and excitation-energy dependence of the spin cutoff parameter},
author = {Grimes, S. M. and Voinov, A. V. and Massey, T. N.},
abstractNote = {Here, the spin cutoff parameter determining the nuclear level density spin distribution ρ(J) is defined through the spin projection as < J2z > 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.},
doi = {10.1103/PhysRevC.94.014308},
journal = {Physical Review C},
number = 1,
volume = 94,
place = {United States},
year = {2016},
month = {7}
}
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Works referencing / citing this record:
Level density rotational enhancement factor
journal, June 2019
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