The extent of energy randomization in the infrared multiphoton dissociation of SF6

✍ Scribed by E.R. Grant; M.J. Coggiola; Y.T. Lee; P.A. Schulz; Aa.S. Sudbo; Y.R. Shen

• Publisher: Elsevier Science
• Year: 1977
• Tongue: English
• Weight: 539 KB
• Volume: 52
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(77)80517-4

✦ Synopsis

Crossed laser and molecular beams were. used to obtain the recoii-energy distributions of fragments in the study af multiphoton dissociation of SF& The measured recoil-ener_gy distributions of SFs under a laser excitation of = 10 J/cm' are in good agreement with the theoretical prediction of the RRKM model for unimofecular dissociation assuming an average excitation of =Z 22 kcaifmole beyond the dissociation threshold and complete energy randomization in the excited molecule before dissociation. At higher laser energy flucnce, it was observed that a secondary dissociation process could occur in which the primary dissociation product, SFs, absorbed more photons and further decomposed into SF4 and F. From the results, WC found that the average dissociation Lifetime for SF6 was z LO ns under our experimenta conditions. * See, for example, papers on the subject presented at the Nordfjord Conference on Tunable Lasers and Applications (June 19761, and references therein.