Applied uses of level density models

Conference · Sun Jan 01 00:00:00 EST 1989

OSTI ID:5346096

Arthur, E D; Guenther, P T; Smith, A B; Smith, D L ^[1]

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1. Los Alamos National Lab., NM (USA)

This paper addresses issues associated with the use of nuclear level density models in calculations made for data applications. The two most commonly used models, the Gilbert Cameron and the Back-Shifted Fermi Gas, are briefly summarized and examples are provided of recent efforts to improve their parameterization. Calculated particle emission spectra are compared with recent experimental data in order to assess performance and sensitivity to these models. Extrapolation of nuclear level densities for calculations involving nuclei away from stability poses special problems and examples of recent efforts to improve such extrapolations are cited. The sensitivity of current schemes in the modeling of fission transition state densities are explored through calculated (n,f) cross sections. Two newer phenomenological models, those of Ignatyuk and Schmidt, provide a more physically realistic description of level densities. Calculations concerning {sup 207}Pb(n,xn) cross sections compare results using the Ignatyuk formalism with the Gilbert Cameron results. 31 refs., 10 figs.

• Research Organization: Argonne National Lab., IL (USA)
• Sponsoring Organization: DOE/ER
• DOE Contract Number: W-31109-ENG-38; W-7405-ENG-36
• OSTI ID: 5346096
• Report Number(s): CONF-8911128-2; ON: DE90003783; TRN: 90-000569
• Resource Relation: Conference: NEANDC specialists' meeting on level densities, Bologna (Italy), 15-17 Nov 1989
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ENERGY LEVELS
NUCLEAR MODELS
CROSS SECTIONS
EMISSION SPECTRA
FERMI GAS
INELASTIC SCATTERING
LEAD 207 TARGET
NEUTRON EMISSION
NEUTRON REACTIONS
NUCLEAR STRUCTURE
USES
BARYON REACTIONS
EMISSION
FLUIDS
GASES
HADRON REACTIONS
MATHEMATICAL MODELS
NUCLEAR REACTIONS
NUCLEON REACTIONS
SCATTERING
SPECTRA
TARGETS
653001* - Nuclear Theory- Nuclear Structure
Moments
Spin
& Models