Nonresonant Multiphoton Ionization of Alkaline Earth Atoms with Intense 532 nm and 1064 nm Radiation

摘要

Nonresonant multiphoton ionization of magnesium and calcium atoms has been studied using 532 nm and 1064 nm radiation in the intensity regime of 10 sup 10 --10 sup 13 W/cm sup 2 . Intensity dependence and angular distribution measurements are made using electron energy analysis and mass spectroscopy. The results for the two alkaline earth atoms are compared and discussed in terms of theoretical scaling laws. The importance of the role of atomic structure are also discussed. 1 ref., 1 fig. (ERA citation 14:023324)