The Natural lifetime of OH (2Σ+, ν = 0, N = 2, J = 32) and its quenching by atomic hydrogen

✍ Scribed by K.H. Becker; D. Haaks; T. Tatarczyk

• Publisher: Elsevier Science
• Year: 1974
• Tongue: English
• Weight: 462 KB
• Volume: 25
• Category: Article
• ISSN: 0009-2614
• DOI: 10.1016/0009-2614(74)85368-6

✦ Synopsis

Fluorescence excitation by a tunable dye-laser has been used for measuring the natural iifetime of the OH('ZC) radical, and its chemical lifetime in the presence of atomic hydrogen, molecular hydrogen and argon. For the 0H(2Z+, u = 0, N = 2.J = 3/2) state a natural lifetime of (0.82 + 0.04) wet was obtained. The quenching rate constants are kH = (5.0 + 0.5) X lo-to cm3 molecule-' set-', kH2 = (7.1 i 1.0) X lo-", and k& = (5.0 f OS) X IO-l3 at room temperature.