| Abstract: | A general comprehensive model of the two-step photodissociation method of isotope enrichment for diatomic reactants was constructed. The model includes kinetic and absorption processes, isotopic species, and temperature. Criteria to measure different aspects of enrichment were established. The results show that, in general, isotopic mixing by kinetic processes can be controlled. The relative importance of intensities of excitation sources for the two steps depends on the degree of saturation of the first-step absorption transition. For the specific system modeled, i.e., the dissociation of HBr followed by scavenging with NO, the model predicts that detection of bromine enrichment is possible. The important processes and their influence on enrichment were identified, and optimization of experimental parameters was modeled. |
