We have measured the rates for quenching of the v = 4 and v = 5 vibrational levels of the A ~ + state of sodium hydride using helium, argon, and nitrogen as the quenching gas. The measured rates are compared with earlier results for state-to-state quenching rates. The measured rates for quenching by
Electronic quenching of the B 2Σ+ state of AlO
✍ Scribed by Mark L. Campbell; Roy E. McClean; Nancy L. Garland; H.H. Nelson
- Publisher
- Elsevier Science
- Year
- 1992
- Tongue
- English
- Weight
- 201 KB
- Volume
- 194
- Category
- Article
- ISSN
- 0009-2614
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✦ Synopsis
Electronic quenching rate constants for the B 2E+ state of AIO were determined using a pulsed-laser photolysis laser-induced fluorescence technique by examining fluorescence decay rates in the presence of seven atomic and molecular collision partners. The two polar molecules CO and NO were found to have rate constant s of 4.8 X 10-12 and 1.8 × 10-to cm 3 s-t, respectively. The nonpolar gases He, H2, N2, CO2 and Xe were found to be poor quenchers with a bimolecular quenching rate constant having an upper bound of 1 × 10-13 cm 3 s-z for He, H2, N2 and Xe and 1 × 10 -12 cm 3 for COz.
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The dependence of the electronic transition moment, Re(R), of the A10(B 2X+-X 2E+) system on the internuclear distance, R, has been determined by an analysis of the intensity distribution of the emission spectra as Re(R)= [1 -2.29(13XR/,~-1.5) 2] (1.510 A ~<R ~< 1.836 ,~). The R dependences of Re(R)
Using laser ablation of aluminum samples under moderate 0 2 pressures the chemiluminescence and reactivity of the excited AIO(B(2E +)) state have been measured. The analysis of the AIO(B) fluorescence corresponding to emission from different internal states with various oxygen concentrations has all