Submillimeter Laser Stark spectroscopy of methyl fluoride at 311 μm

  • G. R. Sudhakaran
  • L. H. Johnston
  • S. R. Raju


Submillimeter Laser-Stark spectra have been observed for methyl fluoride using the 311 μm line of the HCN laser. The spectra were taken for both π and σ polarizations and up to 65,000 V/cm. We identify the multiplet transitions as JK=19K←18K in the ground vibrational state. We have seen seven families with K=10, 11, 12, 13, 14, 15, and 16. Zero field frequencies are given for all families and are more accurate than those calculated from Graner's molecular constants. Second order Stark effect has been observed for the first time in a symmetric top molecule in the presence of a large first-order Stark effect.

Key words

Laser-Stark spectra methyl fluoride symmetric top molecules far infrared spectroscopy 


Unable to display preview. Download preview PDF.

Unable to display preview. Download preview PDF.


  1. 1.
    P. A. Steiner, and W. Gordy, J. Mol. Spectrosc.21, 291 (1966).Google Scholar
  2. 2.
    T. E. Sullivan, and L. Frenkel, J. Mol. Spectrosc.39, 185 (1971).Google Scholar
  3. 3.
    E. D. Palik, and K. N. Rao, J. Chem. Phys.,26, 1401 (1957)Google Scholar
  4. 4.
    L. H. Johnston, R. P. Srivastava, and R. M. Lees, J. Mol. Spectrosc.84, 1–40 (1980).Google Scholar
  5. 5.
    L. H. Johnston, S. R. Raju, and G. R. Sudhakaran, J. Mol. Spectrosc.89, 556 (1981).Google Scholar
  6. 6.
    James E. Wollrab, Rotational Spectra and Molecular Structure, Academic Press, 1967.Google Scholar
  7. 7.
    W. Gordy, and R. L. Cook, “Microwave Molecular Spectra,” Interscience Publishers, 1970.Google Scholar
  8. 8.
    G. Graner, Mol. Phys.31, 1833 (1976).Google Scholar
  9. 9.
    C. H. Townes and A. L. Schawlow, “Microwave Spectroscopy,” McGraw-Hill, New York, 1955.Google Scholar
  10. 10.
    Griffiths and H. W. Thompson, Spectrochimica Acta,24A, 1325 (1968).Google Scholar
  11. 11.
    S. M. Freund, G. Duxbury, M. Romheld, J. T. Tiedje, and T. Oka, J. Mol. Spectrosc.,52, 38 (1974).Google Scholar
  12. 12.
    Mark D. Marshall, and J. M. Muenter, J. Mol. Spectrosc.,83, 279 (1980).Google Scholar

Copyright information

© Plenum Publishing Corporation 1984

Authors and Affiliations

  • G. R. Sudhakaran
    • 1
  • L. H. Johnston
    • 1
  • S. R. Raju
    • 1
  1. 1.Department of PhysicsUniversity of IdahoMoscow

Personalised recommendations