ISSN:
1089-7690
Source:
AIP Digital Archive
Topics:
Physics
,
Chemistry and Pharmacology
Notes:
Mass-resolved excitation spectra of the C1–X0+ band of XeAr were measured under jet-cooled conditions using a tunable coherent vacuum ultraviolet (VUV) light (λ∼130 nm) as an excitation light source and a high-resolution (m/Δm∼1100) reflectron time-of-flight mass spectrometer. The rotational structure of the C1–X0+ (v′,0) (v′=2–6) vibronic bands were recorded by monitoring the parent 132Xe40Ar+ ions and the fragment 132Xe+ ions. From the analysis of the rotational structures, the existence of the two dissociation pathways from the C1 state was identified for the first time; i.e., (i) the rotationally dependent predissociation caused by an electron-rotation interaction (L- and/or S-uncoupling) with the dissociative state with 0− symmetry correlating with the Xe 6s′(1/2)0 level, and (ii) the rotationally independent predissociation caused by the electrostatic interaction with a repulsive state with Ω=1 symmetry correlated either with the Xe 6s(3/2)1 level or the Xe 6s(3/2)2 level. From the least-squares fit to the partially resolved rotational structures, the dissociation rates for these two pathways as well as the band origins and the rotational constants, were derived for the v′=2–6 levels in the C1 state. © 1998 American Institute of Physics.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1063/1.475968
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