Photolytic spectroscopy of simple molecules. II. The production of 6P atoms from the X 1Σg state of Cs2

C. B. Collins, F. W. Lee, J. A. Anderson, P. A. Vicharelli, D. Popescu, Iovitzu Popescu

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In this work the two-photon technique for the study of selective photolysis described in the preceding article was used for the measurement of the relative cross sections for the photolysis of Cs2 into each of the energetically possible product channels that could have been reached at wavelengths in the range from 445 to 640 nm. The resulting dispersion curves showed three relatively broad absorption bands, each leading to a different distribution of population among the product states. A relatively broad band in the blue region of the spectrum was found to yield an inverted branching ratio for dissociation which favored the more highly excited product by a factor of better than 50 to 1. This particular result implied that continuous wave, stimulated emission should be obtained from the 5 2D 3/2→6 2P1/2 transition of atomic cesium with adequate photolytic pumping of Cs2 at blue wavelengths. An analysis of the complete photolysis spectrum obtained in this work indicated that both dissociation and predissociation mechanisms were involved. These results led to the construction of approximate potential curves for a new 3Σu state correlated with Cs(6 2P 3/2) and new 1Σu and 3Σ u states correlated with the 5 2D states of atomic cesium.

Original languageEnglish (US)
Pages (from-to)1067-1073
Number of pages7
JournalThe Journal of Chemical Physics
Issue number2
StatePublished - Jan 1 1981

ASJC Scopus subject areas

  • Physics and Astronomy(all)
  • Physical and Theoretical Chemistry


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