Theoretical L X-ray emission probabilities in the decay of 241Am

L X-rays emitted in the decay of 241 Am are widely used for the calibration of X-ray detectors. Many measurements of the X-ray intensities in this decay have been made, however detailed balancing of the decay scheme has not yet been successful. This work attempts balancing of the decay scheme. The balance does not work with published values of fluorescence yields and Coster—Kronig transition probabilities but produces a better balance than previous studies and also shows the possibility of problems due to chemical effects with 241Am as a standard.