Effect of Missing Levels on the Observed Channels Open in Neutron Fission

摘要

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 exp 235 U in both the Jsup( pi ) = 3 exp - and 4 exp - states. (Atomindex citation 09:381533)