摘要: Publisher Summary The development of oxygen in the early atmosphere led to a concomitant buildup ozone density and significant decrease middle ultraviolet radiation impinging upon earth's surface. importance odd chemistry fixing chemical composition physical structure has encouraged application most sophisticated methods modern its study. Overall rate constants and, large extent, branching ratios have now been well established for deactivation O ( 1 D 2 ), precise yields formation following photolysis Hartley continuum are known. chapter focuses on energetics these important processes, information concerning distribution available energy photodissociative reactive fragments is increasingly becoming available. Such data will permit identification mechanisms by which such processes occur lead their theoretical descriptions at microscopic level. Energy-transfer must be identified understand various airglow phenomena radiative loss.