Use of a pulse-periodic optically pumped CF4 laser for photofragmentation of UF6 molecules

Yurij A. Kolesnikov; A. A. Kotov; Victor P. Novikov

doi:10.1117/12.308390

15 May 1998 Use of a pulse-periodic optically pumped CF₄ laser for photofragmentation of UF₆ molecules

Yurij A. Kolesnikov, A. A. Kotov, Victor P. Novikov

Proceedings Volume 3271, Laser Techniques for State-Selected and State-to-State Chemistry IV; (1998) https://doi.org/10.1117/12.308390
Event: Optoelectronics and High-Power Lasers and Applications, 1998, San Jose, CA, United States

Abstract

Investigations of fragmentation of uranium hexafluoride molecules in radiation field of the optically pumped CF₄ laser are carried out. The optical pumping was made by the pulse-periodic TEA CO₂ laser. The optical cell of the CF₄ laser was cooled by nitrogen vapor with automatic stabilization of the temperature. The maximum radiation energy carried by a single CF₄ laser pulse is 250 mJ and the average power at a pulse repetition frequency of 50 Hz is up to 6 W. It was found that besides the direct fragmentation of UF₆ molecules, the bimolecular V-V exchange realizes most probably at collision of highly excited molecules, consequently the vibronic energy of one of the molecules can exceed the dissociation threshold. Increase by an order of the UF₆ molecules photofragmentation efficiency at presence of hydrogen can be explained by high chemical activation because of reverse electron relaxation of highly vibronic excited UF₆ molecules. There is also ascertained that polymerization of UF₅ radicals appears to be the most high-speed of al secondary reactions. In the main part the polymers ar found on the cell surface having number of the radicals in range from 2 to approximately 10.

Citation Download Citation

Yurij A. Kolesnikov, A. A. Kotov, and Victor P. Novikov "Use of a pulse-periodic optically pumped CF₄ laser for photofragmentation of UF₆ molecules", Proc. SPIE 3271, Laser Techniques for State-Selected and State-to-State Chemistry IV, (15 May 1998); https://doi.org/10.1117/12.308390

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