Massnumber and excitationenergy 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 < 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 swave 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 superconducting 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; FG0288ER40387
 Resource Type:
 Accepted Manuscript
 Journal Name:
 Physical Review C
 Additional Journal Information:
 Journal Volume: 94; Journal Issue: 1; Journal ID: ISSN 24699985
 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. Massnumber and excitationenergy 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. Massnumber and excitationenergy dependence of the spin cutoff parameter. United States. doi:10.1103/PhysRevC.94.014308.
Grimes, S. M., Voinov, A. V., and Massey, T. N. Tue .
"Massnumber and excitationenergy dependence of the spin cutoff parameter". United States. doi:10.1103/PhysRevC.94.014308. https://www.osti.gov/servlets/purl/1338916.
@article{osti_1338916,
title = {Massnumber and excitationenergy 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 swave 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 superconducting 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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