Effect of missing levels on the observed channels open in neutron fission
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Date
1978-03
Authors
Journal Title
Journal ISSN
Volume Title
Publisher
Australian Atomic Energy Commission
Abstract
It is shown that the effect of missing small fission widths in the analysis of a fission width distribution is to give an apparent number of channels open greater than the actual number open. This is demonstrated both by a numerical experiment and by analytical considerations. A set of resolution probabilities is postulated such that when the apparent distribution is calculated from the true distribution, the effective number of degrees of freedom increases by a specific amount. The theory is applied to the experimental set of fission widths for neutron fission of 235U in both the J = 3 and 4 states.
Description
Keywords
Uranium 235, Energy levels, Cross sections, Level widths, Fission neutrons
Citation
Clancy, B. E., Cook, J. L., & Rose, E. K., (1978). The effect of missing levels on the observed channels open in neutron fission (AAEC-E-444). Lucas Heights, NSW: Australian Atomic Energy Commission, Research Establishment.