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Proceedings Paper

Use of a pulse-periodic optically pumped CF4 laser for photofragmentation of UF6 molecules
Author(s): Yurij A. Kolesnikov; A. A. Kotov; Victor P. Novikov
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Paper 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.

Paper Details

Date Published: 15 May 1998
PDF: 7 pages
Proc. SPIE 3271, Laser Techniques for State-Selected and State-to-State Chemistry IV, (15 May 1998); doi: 10.1117/12.308390
Show Author Affiliations
Yurij A. Kolesnikov, Troitsk Institute for Innovation and Fusion Research (Russia)
A. A. Kotov, Troitsk Institute for Innovation and Fusion Research (Russia)
Victor P. Novikov, Troitsk Institute for Innovation and Fusion Research (Russia)


Published in SPIE Proceedings Vol. 3271:
Laser Techniques for State-Selected and State-to-State Chemistry IV
John W. Hepburn; Robert E. Continetti; Mark A. Johnson, Editor(s)

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