IF molecules were prepa.red in a miaowave disckuge by using C3FpI Cheptafluoro-2-iodopropane) or by the direct reaction X2 + F2 \_ The hyperfine structure of the rotational transitions f + 1 -f = 54 of the nirational level u' = 3 and 6 -5 of U' = 4 in the excited electronic state B 3 n e+ of IF has
Chemical generation of excited IF(B3Π0+)
✍ Scribed by S.J. David; A.P. Ongstad; M.A. Macdonald; R.D. Coombe
- Publisher
- Elsevier Science
- Year
- 1987
- Tongue
- English
- Weight
- 469 KB
- Volume
- 136
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
The interhalogen IF was excited to its B 'II 0+ state by collisions with chemically produced N,( A 'Z: ) metastables. The excited nitrogen metastables were generated by the reaction of N(%) atoms with Ns radicals. The reaction system was operated both as a continuous flame in a discharge-flow system and as a pulse initiated by photolysis of the reaction medium at 10.6 pm. The data suggest the possibility of an IF B 'II,+ + X 'I: + laser pumped by this chemical system.
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Rare consnmrs for the electronic quenching of IF B3fl(O+ ) LI's-' 3-6 by 12were measured IO be k, = (3.5~O.Z)~10-'~ cm3 al 300 K using Lime-resolved laser-induced fluorerccncc. Fluorescence spcc~ra were also obtained and possible quenching mrchanisms are discussed on the basis of these results.
Pure rotntion.d transitions were observed in the electronically exited state B 3~ o+ of ICI. This state \SIS populated by optical pumping with a single-mode dye laser\_ From the observed spectrum precise rnlues of the quJdrup& h) pertine coupling constat cqQ of iodine and the effective rotational co
Rotationally resolved laser excitation spectra of the O-O and 1-O bands of the CN A\*ll-X29 system have been observed. By momtoring the decay of the A \*ll state population preliminary measurements of the hfetlme of the u = 0 level have been made.