TITLE

Quantitative determination of H2, HD, and D2 internal-state distributions by (2+1) resonance-enhanced multiphoton ionization

AUTHOR(S)
Rinnen, Klaus-Dieter; Buntine, Mark A.; Kliner, Dahv A. V.; Zare, Richard N.; Huo, Winifred M.
PUB. DATE
July 1991
SOURCE
Journal of Chemical Physics;7/1/1991, Vol. 95 Issue 1, p214
SOURCE TYPE
Academic Journal
DOC. TYPE
Article
ABSTRACT
The relationship between quantum-state populations and ion signals in (2+1) resonance-enhanced multiphoton ionization (REMPI) detection of H2, HD, and D2 via the E, F 1Σ+g (v’E=0, J’=J‘)–X 1Σ+g (v‘,J‘) transition is determined by calibration against a thermal effusive source. Correction factors are obtained for 102 rovibrational levels for v‘=0, 1, and 2 and J‘ ranging from 0 to 17. Within a given v‘, rotational correction factors are nearly unity except for the highest J‘ levels. The vibrational correction factors vary with v‘; (2+1) REMPI detection is 2–3 times more sensitive to v‘=1 and 2 than to v‘=0. Experimental correction factors are compared with those derived from a theoretical calculation of the two-photon transition moments by Huo et al. [J. Chem. Phys. 95, xxxx (1991)]. In general, the agreement is excellent, which suggests that theoretical correction factors may be used when experimental ones are unavailable.
ACCESSION #
7616196

 

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