In this study, the selective photoexication of isotopic mixtures by laser light is
investigated. Atomic and molecular methods are examined and rate equations are
derived for both cases. Two and three step photoionization techniques are considered
and rate equations are solved for ion yields. The molecular photodissociation process
is also studied and the dependence of the dissociation product on the laser fluence is
reported. The results of the developed model for SF molecule is compared with the
other results and the agreement found in this comparison indicates the validity of the
developed model