HSiF has been detected by laser-induced fluorescence, following the formation of the ground-state radical in the flow reaction of SiH2 with Fz at a total pressure of 0.05-0.15 Ton. We report here the radiitive life-tie of the fust vibronic state of HSiF (A 'A") as well as a tentative assignment of
Laser-induced fluorescence of the CHF radical
✍ Scribed by M.N.R. Ashfold; F. Castaño; G. Hancock; G.W. Ketley
- Publisher
- Elsevier Science
- Year
- 1980
- Tongue
- English
- Weight
- 333 KB
- Volume
- 73
- Category
- Article
- ISSN
- 0009-2614
No coin nor oath required. For personal study only.
✦ Synopsis
Laser-mduced fluorescence of the x 'A"-% 'A' transition in the gas-phase CHF radical has been observed, foBowing the fo_rmatron of the ground-state radical by 1R multiple-photon dissociation. Radiative kfetimes of four vibroruc states of CHF (A 1 A") are reported. * Throughout tius paper ape values are gven III kcal mol-'. F'g. 1. Laser excltatlon spectrum of the CHF x 'A" (OOO)-X lA'(000) transltlon, with posltions of Q branch band heads marked CHF (2) was formed from the IR hlPD of 5.2 mTorr CHzFCl Hnth the P(20) CO2 laser lme at 9.55 urn The dye laser pulse was delayed 2 5 ~1s from the peak of the CO2 pulse. at wiuch time the fluence dehvered was 50 J cmm2.
📜 SIMILAR VOLUMES
Dichlorosilylene, Sic12 , in the gas phase has been detected by laser-induced fluorescence of the x 'B1-?? 'Al transition in the 309-333 mn region. The wavenumber of the 0: transition is determined to be 30003.6 f 0.5 cm-' (333.20 nm). The fundamental vibrational frequencies are assigned to be IJ~ =
In the spectral range 34500-40000 cm-1, two molecular species were detected by means of laser-induced fluorescence in the 193 nm photolysis of acetylene: one is C2(a 3Hu), the other is most likely C2H(X). The identification of C2H is based upon the rotational constants (B"= 1.4397-1.4534 cm-t), the
CFBr radicals produced by the reaction of atomic oxygen with FzCCFBr were monitored in a discharge flow system by fluorescence excited at 424 nm. The rate coefficients for reactions of the CFBr radicals were measured between 298 and 358 K, and the following values were obtained in units of cm3/molec
The visible absorption spectra of all the monomethylbenzyl and monofluorobenzyl rachcals in the gas phase have been studied by laser-induced fluorescence. The fluorescence lifetimes of the stronger vibronic transltions have been measured. It is concluded that, unlike benzyl itself, a single excited