A model suitable for the prediction of gamma-ray spectra subsequent to the capture of neutrons into nuclear states of identifiable spin and parity has been developed. The dependence of radiative transition probabilities on the nuclear selection rules is explicitly accounted for. Means are provided for allowing dipole and quadrupole transitions in conjunction with variations in the magnitudes of corresponding transition “matrix elements.” Comparisons are given between experimental capture spectra and corresponding spectra calculated with varying assumptions with respect to pertinent nuclear parameters for two capture states of 28Al and one of 25Mg. A comparison of calculated spectra using fitted and crudely approximated cascade parameters for the 28Al capture states indicates few, if any, differences that would significantly change resultant neutron-capture gamma-ray-production cross sections.