I. Uranyl-oxalate actinometry at high intensities

Abstract

The possibility of applying uranyl-oxalate actinometry at the intensities produced by high-energy flash discharges is investigated. It is shown that the photochemical decomposition of oxalate produced by a high-energy flash is directly proportional to intensity over an intensity range of 1000. Since the rate of decomposition at the lowest flash intensity is comparable with that calculated for the highest intensity previously studied in uranyl-oxalate actinometry, it is concluded that the quantum yield of the uranyl-oxalate system is unchanged up to intensities 10$^{3}$ times greater than those previously investigated. The available output in the ultra-violet region is given for several experimental arrangements.