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REMPI/MS detection of SiF2 radicals by (3+1) and (1+3) photoionization

✍ Scribed by J.S. Horwitz; C.S. Dulcey; M.C. Lin

Publisher: Elsevier Science
Year: 1988
Tongue: English
Weight: 528 KB
Volume: 150
Category: Article
ISSN: 0009-2614
DOI: 10.1016/0009-2614(88)80415-9

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✦ Synopsis

SiFz has been detected by resonance-enhanced multiphoton ionization mass spectrometry. Two new absorptions have been observed at 48 1.30 and 379.94 nm and assigned as the (3 + 1) photoionization via the B 'B, state and the ( I+ 3) absorption via the 8 'Bi state. A third absorption is observed between 390 and 430 nm which cannot be assigned to any known electronic states of SiF*. Most likely, this is a (3 + 1) photoionization via a Rydberg state. SiF, radicals were produced by the reaction of SiF3H with F atoms and by the reaction of F, with heated silicon crystals under single gas-surface collision conditions.

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