Statistical properties of excited nuclei in the mass range 47 Less-Than-Or-Slanted-Equal-To A Less-Than-Or-Slanted-Equal-To 59

Journal Article · Sat Sep 15 04:00:00 EDT 2012 · Physics of Atomic Nuclei

DOI:https://doi.org/10.1134/S1063778812090153· OSTI ID:22069384

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

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

Level densities and their energy dependences for nuclei in the mass range of 47 {<=} A {<=} 59 were determined from the results obtained by measuring neutron-evaporation spectra in respective (p, n) reactions. The spectra of neutrons originating from the (p, n) reactions on {sup 47}Ti, {sup 48}Ti, {sup 49}Ti, {sup 53}Cr, {sup 54}Cr, {sup 57}Fe, and {sup 59}Co nuclei were measured in the proton-energy range of 7-11 MeV. These measurements were performed with the aid of a fast-neutron spectrometer by the time-of-flight method over the base of the EGP-15 pulsed tandem accelerator installed at the Institute for Physics and Power Engineering (Obninsk, Russia). A high resolution of the spectrometer and its stability in the time of flight made it possible to identify reliably discrete low-lying levels along with the continuum part of neutron spectra. Our measured data were analyzed within the statistical equilibrium and preequilibrium models of nuclear reactions. The respective calculations were performed with the aid of the Hauser-Feshbach formalismof statistical theory supplemented with the generalized model of a superfluid nucleus, the back-shifted Fermi gas model, and the Gilbert-Cameron composite formula for nuclear level densities. Nuclear level densities for {sup 47}V, {sup 48}V, {sup 49}V, {sup 53}Mn, {sup 54}Mn, {sup 57}Co, and {sup 59}Ni and their energy dependences were determined. The results are discussed and compared with available experimental data and with recommendations of model-based systematics.

• OSTI ID: 22069384
• Journal Information: Physics of Atomic Nuclei, Journal Name: Physics of Atomic Nuclei Journal Issue: 9 Vol. 75; ISSN 1063-7788; ISSN PANUEO
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
CHROMIUM 53 TARGET
COBALT 57
COBALT 59 TARGET
ENERGY DEPENDENCE
ENERGY-LEVEL DENSITY
FAST NEUTRONS
FERMI GAS MODEL
IRON 57 TARGET
MANGANESE 54
MEV RANGE
NEUTRON EMISSION
NEUTRON SPECTRA
NICKEL 59
PROTON REACTIONS
STATISTICAL MODELS
SUPERFLUIDITY
TITANIUM 47 TARGET
VANADIUM 47