THEORETICAL-L X-RAY-EMISSION PROBABILITIES IN THE DECAY OF AM-241

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