Alpha-particle emission probabilities in the decay of 244Cm

244Cm decays by alpha-particle emission with a half-life of 18.11 years. Alpha-particle emission probabilities (Pα) have been measured using sources produced by electrodeposition and a temperature stabilized chamber with implanted silicon detectors. Several spectra, taken at different geometries, have been analyzed to obtain Pα values for the major emissions. The results are: Pα0=0.7663(18), Pα42=0.2334(18), Pα141=0.000205(15) and Pα294=0.000038(5).