Effect of missing levels on the observed channels open in neutron fission
Australian Atomic Energy Commission
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.
Uranium 235, Energy levels, Cross sections, Level widths, Fission neutrons
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.