INELASTIC PROCESSES IN ROTATIONAL MANIFOLD OF CO PERTURBED BY CO, He, $H_{2}$
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Date
1979
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Ohio State University
Abstract
A time-resolved double resonance technique, involving two CO lasers, was used to study various inelastic processes among the rotational levels of CO. The CO lasers transitions ware tuned to the $1 \rightarrow 0$ band for the PUMP and to the $2 \rightarrow 1$ band for the PROBE. Gas pressures in the sample cell were in the range 1-100 mtorr. The investigated levels lied from J = 8 to J = 12. Rotational relaxation behaviours were measured when varying pressure, temperature (room or liquide-$N_{2}$), type of perturber ($CO, He, H_{2}$) and the direction of polarization of the laser beams. The results are discussed in connection with the line-broadening available data. Detailed information can be obtained, such as ``collisional selection rules’’, importance of velocity changes or alignment relaxation rate.
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