Jump to main content
Jump to site search

Volume 71, 1981
Previous Article Next Article

Studies of the optical spectra of CaCl and SrF at sub-Doppler resolution


Lines in the (0, 0) bands of the A2Π–X2Σ+ and B2Σ+X2Σ+ systems of CaCl and the B2Σ+X2Σ+ system of SrF have been studied at sub-Doppler resolution by intermodulation spectroscopy. The linewidth was typically 40 MHz (f.w.h.m.). The 19F hyperfine splitting was resolved in the SrF spectrum and was measured for several rotational lines. The measurements were used in conjunction with the hyperfine parameters for the molecule in the ground state (measured by e.s.r.) to determine the following parameters for the B2Σ+ state: b= 12.9 ± 1.6 MHz c=–51 ± 28 MHz. These results suggest that the molecule is ionic, Sr+F, in the B state. It has not proved possible to resolve 35Cl or 37Cl hyperfine structure in any of the lines studied in either the AX or the BX transitions of CaCl. There are pronounced crossover signals in the AX system which have a negative sign (i.e., opposite to the normal Lamb dip signal). The dependence of these signals on various experimental parameters has been investigated. A density matrix description of the three-level system is presented and solved to 4th order by an iterative method. To this order, the model predicts that the Lamb dip and crossover signals should have the same sign.

Back to tab navigation

Article type: Paper
DOI: 10.1039/DC9817100151
Citation: Faraday Discuss. Chem. Soc., 1981,71, 151-163
  •   Request permissions

    Studies of the optical spectra of CaCl and SrF at sub-Doppler resolution

    J. M. Brown, D. J. Milton and T. C. Steimle, Faraday Discuss. Chem. Soc., 1981, 71, 151
    DOI: 10.1039/DC9817100151

Search articles by author