Isomer ratio calculations using modeled discrete levels

We have calculated isomer ratios for the 175Lu(n,γ), 175Lu(n,2n), 237Np(n,2n), 241Am(n,γ), and 243Am(n,γ) reactions using modeled level structures in the deformed, odd-odd product nuclei. We find: that the hundreds of discrete levels and their gamma-ray branching ratios provided by the modeling are necessary to achieve agreement with experiment, that many rotational bands must be included in order to obtain a sufficiently representative selection of K quantum numbers, and that the levels of each band must be extended to appropriately high values of angular momentum. 8 references