Predissociation lifetimes of the rotational and fine structure levels of O2+(b4Σ−g, v=3,4,5)
- 1 February 1979
- journal article
- research article
- Published by AIP Publishing in The Journal of Chemical Physics
- Vol. 70 (3) , 1474-1481
- https://doi.org/10.1063/1.437586
Abstract
A fast ion beam coaxial with a single mode laser has been used to measure the absorption linewidths of predissociated levels of O+2(b4Σg−, v=3,4,5) by detection of the O+ photofragments. Tuning of the absorption wavelength was accomplished by a combination of intracavity etalons and variation of the ion beam velocity (Doppler tuning). Lifetimes were determined for the b state fine structure levels of rotational levels N=31 and 33 of 16O2+(v=3), N=9–25 of 16O2+(v=4), N=14–27 of 16,18O2+(v=4), and N=5–7 of 16O2+(v=5). The lifetimes vary from 0.06 to 4 nsec. Variation with all relevant quantum numbers and with isotopic composition is discussed.Keywords
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