Nuclear level densities in {sup 47}V, {sup 48}V, {sup 49}V, {sup 53}Mn, and {sup 54}Mn from neutron evaporation spectra

Journal Article · Tue Mar 15 04:00:00 EDT 2011 · Physics of Atomic Nuclei

DOI:https://doi.org/10.1134/S1063778811030173· OSTI ID:22029944

Lychagin, A A; Titarenko, N N; Demenkov, V G; Trykova, V I ^[1]

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1. Institute for Physics and Power Engineering (Russian Federation)

The spectra of neutrons from the (p, n) reactions on {sup 47}Ti, {sup 48}Ti, {sup 49}Ti, {sup 53}Cr, and {sup 54}Cr nuclei were measured in the proton-energy range 7-11 MeV. The measurements were performed with the aid of a fast-neutron spectrometer by the time-of-flight method over the base of the EGP-15 tandem accelerator of the Institute for Physics and Power Engineering (IPPE, Obninsk). Owing to a high resolution and a high stability of the time-of-flight spectrometer used, low-lying discrete levels could be identified reliably along with a continuum section of neutron spectra. An analysis of measured data was performed within the statistical equilibrium and preequilibrium models of nuclear reactions. The relevant calculations were performed by using the exact formalism of Hauser-Feshbach statistical theory supplemented with the generalized model of a superfluid nucleus, the back-shifted Fermi gas model, and the Gilbert-Cameron composite formula for the nuclear level density. The nuclear level densities for {sup 47}V, {sup 48}V, {sup 49}V, {sup 53}Mn, and {sup 54}Mn were determined along with their energy dependences and model parameters. The results are discussed together with available experimental data and recommendations of model systematics.

• OSTI ID: 22029944
• Journal Information: Physics of Atomic Nuclei, Journal Name: Physics of Atomic Nuclei Journal Issue: 3 Vol. 74; ISSN 1063-7788; ISSN PANUEO
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CHROMIUM 53 TARGET
ENERGY DEPENDENCE
ENERGY-LEVEL DENSITY
FAST NEUTRONS
FERMI GAS MODEL
HAUSER-FESHBACH THEORY
MANGANESE 53
MANGANESE 54
NEUTRON EMISSION
NEUTRON SPECTRA
PROTON REACTIONS
STATISTICAL MODELS
SUPERFLUID MODEL
TIME-OF-FLIGHT METHOD
TITANIUM 47 TARGET
TITANIUM 49 TARGET
VANADIUM 47
VANADIUM 48
VANADIUM 49