Application of droplet evaporation model to the expansion cooling of an atomic uranium beam

Abstract
By using the technique of laser induced fluorescence to measure the velocity distribution function of an atomic uranium beam produced by evaporation from a spherical surface by electron bombardment, the authors have observed the phenomenon of vapour expansion cooling. Agreement between the theoretical analysis and experimental results is satisfactory. Some of the results are compared with those published by Havazelet and Birnboim (1983) and good agreement is achieved.