X- and γ-ray emissions observed in the decay of 237Np and 233Pa

Solvent extraction was used to prepare pure solutions of 237Np and 233Pa. Portions were used for liquid scintillation counting (disintegration rates) and γ-ray spectroscopy with HPGe detectors. X- and γ-ray intensities observed in the 237Np decay were verified, with a new result of 15.08±0.04% for the 29 keV γ-ray (5σ higher than previous reports). K X- and γ-ray intensities observed in the 233Pa decay were verified with new results for the L X-ray intensities (not, vert, similar55% total L intensity), approximately twice previously reported total intensity.