Ultraviolet Absorption Cross Sections for the Alkali Halide Vapors

The ultraviolet-absorption cross sections for the alkali halide vapors were measured in the region from 2000 to 4000 Å. Potential curves were constructed from these data and are compared to some previous work. From the cross sections the radiative lifetime of the excited molecular states is calculated to be on the order of 10−8 sec.