Rotational state-spcc~fic ra~c constants arc mcasurcd for the clcctronic quenching of the OH(A 'r+. U' = 0) state b> N2, 02. H,. Dz. Hz0 and D,O usin: time-rcsolvcd laser-induced fluorrscencc. .A significant drcrcasc in rhc electronic quenching mtc constant is obscmed 3s the amount of rotarional ex
Rotational dependence of vibrational relaxation in a 2Σ+ OH
✍ Scribed by Russell K. Lengel; David R. Crosley
- Publisher
- Elsevier Science
- Year
- 1975
- Tongue
- English
- Weight
- 540 KB
- Volume
- 32
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
A frequency doubled tu?able dye Iaser hns been used to s&c&y excit P the OH mok-cule to the N' = 0.3 nnd5 rotational Ieve@ of the u' = 1 vibrational level of the A2~C.state. Addition of the gases He, Ar, Ciz, DZ and k& uuses energy transfer to the U' = 0 level. In the cases of Hz, DZ and Nz, the vibrational energy transfer cross section is faund ;o decrease .asN' inp~txses over the range inve+igated.
📜 SIMILAR VOLUMES
Cross sections and rate constants for the inelastic collision, OH(A2Z+,v=I,j=15) + Ar ~ OH(A2 r.+,v=0,]=20) + Ar, have been calculated in the infinite-order sudden (IOS) and distorted-wave (DW) approximations. The results agree well with experiment.
The vibrational predissociation and electronic quenching dynamics of weakly bound OH-N z (A 2X +) complexes have been examined using laser-induced fluorescence and dispersed fluorescence. We find that predissociation occurs on a ~< 1 ps timescale for complexes prepared in levels correlating with OH
The collisional quenching of OH A'Z(u' = 1) by Hz0 was determined from laser-induced fluorescence measurements in the burned-gas region of stoichiometric H,/OJAr flames at low pressure ( 19 and 38 Torr). The collisional quenching was measured as a function of the initial laser-populated rotational l