LAMB DIP SPECTROSCOPY APPLIED TO SF6

Line centers of a number of previously unresolved SF6 transitions of the fundamental ν3 band have been observed and their frequencies have been determined relative to the P-branch transitions of the CO2 10.6-μ laser. Measurements of dip widths at small saturation levels yielded a determination of the SF6Single Bond signSF6 cross section for phase interruption. Observation of a multiplicity of absorption line centers over the tuning range of the P(20) laser transition, several well within one SF6 Doppler width of 29 MHz, verifies the complex nature of the P(20) line absorption found by other workers. © 1969 The American Institute of Physics.