Revisiting the {sup 238}U Thermal Capture Cross Section and Gamma-Ray Emission Probabilities from {sup 239}Np Decay

The precise value of the thermal capture cross section of {sup 238}U is uncertain, and evaluated cross sections from various sources differ by more than their assigned uncertainties. A number of the original publications have been reviewed to assess the discrepant data, corrections were made for mor...

Full description

Saved in:
Bibliographic Details
Published inNuclear science and engineering Vol. 150; no. 3
Main Authors Trkov, A., Molnar, G.L., Revay, Zs, Mughabghab, S.F., Firestone, R.B., Pronyaev, V.G., Nichols, A.L., Moxon, M.C
Format Journal Article
LanguageEnglish
Published United States 15.07.2005
Subjects
CAPTURE
CORRELATIONS
CROSS SECTIONS
EMISSION
GAMMA RADIATION
NEPTUNIUM 239
NUCLEAR DECAY
NUCLEAR PHYSICS AND RADIATION PHYSICS
PROBABILITY
URANIUM 238
Online AccessGet full text

Cover

More Information
Summary:The precise value of the thermal capture cross section of {sup 238}U is uncertain, and evaluated cross sections from various sources differ by more than their assigned uncertainties. A number of the original publications have been reviewed to assess the discrepant data, corrections were made for more recent standard cross sections and other constants, and one new measurement was analyzed. Because of the strong correlations in activation measurements, the gamma-ray emission probabilities from the {beta}{sup -} decay of {sup 239}Np were also analyzed. As a result of the analysis, a value of 2.683 {+-} 0.012 b was derived for the thermal capture cross section of {sup 238}U. A new evaluation of the gamma-ray emission probabilities from {sup 239}Np decay was also undertaken.
ISSN:0029-5639
1943-748X