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Journal of Chemical Physics / Volume 110 / Issue 16 / GAS PHASE DYNAMICS AND STRUCTURE: SPECTROSCOPY, MOLECULAR INTERACTIONS, SCATTERING, AND PHOTOCHEMISTRY

J. Chem. Phys. 110, 7699 (1999); http://dx.doi.org/10.1063/1.478681 (8 pages)

The A 3Π state of SO

John M. F. Elks and Colin M. Western

School of Chemistry, University of Bristol, Cantock’s Close, Bristol, BS8 ITS, United Kingdom

(Received 5 November 1998; accepted 25 January 1999)

Laser induced fluorescence and 1+1 resonance enhanced multiphoton ionisation spectra of the A 3Π–X 3Σ− transition of SO radicals prepared by an electric discharge in a supersonic jet expansion are presented. Rotational constants are given for A state vibrational levels with v′ = 0–13, extending to within 190 cm−1 of the A state dissociation limit. The Rydberg–Klein–Rees curve derived from these constants shows significant anharmonicity, even around the equilibrium geometry. In addition, several small local perturbations of the rotational structure are observed. Collision free fluorescence lifetimes are determined for the complete range of vibrational states, and are found to fall smoothly from 29.5 μs for v′ = 0 to 6.45 μs for v′ = 12. Combining these data with earlier measurements leads to a better determination of the A–X transition dipole moment over the range 1.4–2.0 Å. © 1999 American Institute of Physics.

© 1999 American Institute of Physics

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KEYWORDS and PACS

Keywords

sulphur compounds, molecular electronic states, fluorescence, photoionisation, multiphoton spectra, free radicals, potential energy surfaces, radiative lifetimes, transition moments

PACS

  • 33.50.Dq

    Fluorescence and phosphorescence spectra

  • 33.80.Eh

    Autoionization, photoionization, and photodetachment

  • 33.80.Wz

    Other multiphoton processes

  • 31.90.+s

    Other topics in the theory of the electronic structure of atoms and molecules (restricted to new topics in section 31)

  • 33.70.Ca

    Oscillator and band strengths, lifetimes, transition moments, and Franck-Condon factors

ARTICLE DATA

Digital Object Identifier
http://dx.doi.org/10.1063/1.478681

PUBLICATION DATA

ISSN

0021-9606 (print)  
1089-7690 (online)

Publisher

$abstract.society.value is a Member of CrossRef American Institute of Physics

For access to fully linked references, you need to log in.
    M. P. Fülscher, M. Jaszunski, B. O. Roos, and W. P. Kraemer, J. Chem. Phys. 96, 504 (1992)JCPSA6000096000001000504000001.

    E. V. Martin, Phys. Rev. 41, 167 (1932).

    J. A. Paisner and R. Wallenstein, J. Chem. Phys. 61, 4317 (1974)JCPSA6000061000010004317000001.

    M. E. Green and C. M. Western, J. Chem. Phys. 104, 848 (1996)JCPSA6000104000003000848000001.


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