ISSN:
1432-0649
Keywords:
32.80Dz
;
32.80Rm
;
32.30
Source:
Springer Online Journal Archives 1860-2000
Topics:
Physics
Notes:
Abstract Sulfur atoms are produced in the excited 3s 23p 4 1 D 2 and 3s 23p 4 1 S 0 levels by two-photon photodissociation of CS2 in the gas phase in the region 285–305 nm. These excited atoms are detected by three-photon (two to resonance) ionisation at selected laser wavelengths. Many new transitions have been observed which have not been reported previously. The new “dark” states that have been accessed by two-photon absorption have been characterised and the energy levels with respect to the ground 3 P 2 state have been determined. Configuration interaction between 6p 3 P 1, 6p 5 P 1, and 4p′1 P 1 states, and also between 6p 3 P 2, 6p 5 P 2, and 4p′1 D 2 states has been observed. It is found that intermediate states reached from the 1 S 0 level through two-photon absorption lie above the first ionisation potential of S+(4 S 0). It is proposed that autoionisation into the 4 S 0+e− continuum is a dominant mechanism in the decay of these levels, although ionisation by a further photon absorption is not ruled out.
Type of Medium:
Electronic Resource
URL:
http://dx.doi.org/10.1007/BF00357663
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