Using a copper-vapor laser (578.2 nm) in a new method of laser fluorescence for molecular iodine isotopes to detect gases in real time

摘要

This letter deals with the development of a new laser method for simultaneously detecting ~(127)I_2, ~(127)I~(129)I and ~(129)I_2 in gaseous media, which, in contrast with existing methods, does not require tuning of the laser wavelength. The method is based on exciting fluorescence in iodine isotopologues using copper-vapor laser radiation (578.2 nm) and registering the separate spectral fluorescence line intensities. This method allows high-sensitivity real-time monitoring of isotopologues of molecular iodine-129 and iodine-127 in technological media generated during the reprocessing of spent nuclear fuel, in gaseous emissions from the purification systems of radiochemical plants and in the natural atmosphere.