Nuclear level densities in {sup 208}Bi and {sup 209}Po from the neutron spectra in the (p, n) reactions on {sup 208}Pb and {sup 209}Bi nuclei

Journal Article · Thu Jul 15 04:00:00 EDT 2010 · Physics of Atomic Nuclei

DOI:https://doi.org/10.1134/S1063778810070033· OSTI ID:21436232

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

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

The spectra of neutrons from the (p, n) reactions on the {sup 208}Pb and {sup 209}Bi nuclei were measured in the proton-energy range 8-11 MeV. These measurements were performed by using a time-of-flight spectrometer of fast neutrons on the basis of the pulsed tandem accelerator EGP-15 of the Institute of Physics and Power Engineering (Obninsk, Russian Federation). A high resolution and stability of the time-of-flight spectrometermade it possible to identify reliably low-lying discrete levels alongwith the continuum section of the neutron spectra. The measured data were analyzed on the basis of the statistical equilibrium and preequilibrium models of nuclear reactions. The respective calculations were performed by using the precise formalism of Hauser-Feshbach statistical theory together with the generalized model of a superfluid nucleus and the back-shifted Fermi gas model for the nuclear-level density. The nuclear-level densities in {sup 208}Bi and {sup 209}Po were determined along with their energy dependencies and model parameters. Our results are discussed together with available experimental data and recommendations of model systematics.

• OSTI ID: 21436232
• Journal Information: Physics of Atomic Nuclei, Journal Name: Physics of Atomic Nuclei Journal Issue: 7 Vol. 73; ISSN 1063-7788; ISSN PANUEO
• Country of Publication: United States
• Language: English

Related Subjects

73 NUCLEAR PHYSICS AND RADIATION PHYSICS
ACCELERATORS
ALPHA DECAY RADIOISOTOPES
BARYONS
BETA DECAY RADIOISOTOPES
BISMUTH 208
BISMUTH 209
BISMUTH ISOTOPES
DATA
ELECTRON CAPTURE RADIOISOTOPES
ELECTROSTATIC ACCELERATORS
ELEMENTARY PARTICLES
ENERGY DEPENDENCE
ENERGY RANGE
ENERGY-LEVEL DENSITY
EVEN-EVEN NUCLEI
EVEN-ODD NUCLEI
EXPERIMENTAL DATA
FAST NEUTRONS
FERMI GAS MODEL
FERMIONS
HADRONS
HEAVY NUCLEI
INFORMATION
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
LEAD 208
LEAD ISOTOPES
MATHEMATICAL MODELS
MEASURING INSTRUMENTS
MEV RANGE
NEUTRON SPECTRA
NEUTRONS
NUCLEAR MODELS
NUCLEAR REACTIONS
NUCLEI
NUCLEONS
NUMERICAL DATA
ODD-EVEN NUCLEI
ODD-ODD NUCLEI
POLONIUM 209
POLONIUM ISOTOPES
PROTONS
RADIOISOTOPES
RESOLUTION
SPECTRA
SPECTROMETERS
STABLE ISOTOPES
STATISTICAL MODELS
TANDEM ELECTROSTATIC ACCELERATORS
TIME-OF-FLIGHT SPECTROMETERS
YEARS LIVING RADIOISOTOPES