Wick’s limit and a new method for estimating neutron reaction cross sections

We construct an analytic model to demonstrate qualitatively the correspondence between the measured neutron total cross section and the regions where Wick's limit is actually an equality. This model does not give sufficiently accurate quantitative results, so we extend our calculations by using the nuclear optical model with both local and global parameters. We then demonstrate how Wick's limit can be used to give useful reaction cross-section information.