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Phys. Rev. A 4, 610 (1971); and private communication. The experimental cross sections given in Fig. 3 represent revisions of the published values.An analysis of electron drift-velocity data in cesium has been conducted in order to determine the electron momentum-transfer cross section. Numerical evaluation of the drift-velocity integral using numerous trial functions for the cross section has revealed the qualitative and semiquantitative nature of the electron momentum-transfer cross section in cesium. The cesium cross section found to be most consistent with the available experimental data exhibits considerable variation with electron energy in the range 0.1-1.0 eV, the region of primary importance in plasma applications.

A kinetic model of the sustained discharge HgBr laser Results are reported of an investigation of fundamental kinetic processes influencing discharge and laser properties typical of the 502-nm HgBr(B-X)/HgBr2 dissociation laser. Specific attention is focused on conditions representative of electron-beam-controlled discharges. Experimental results and corresponding analysis and interpretation are presented for several laser mixtures, focusing particularly on the factors affecting discharge characteristics and HgBr(B ) formation. A set of phenomenological electron-HgBr2 cross sections inferred on the basis of analysis of experimental observations is presented, along with a discussion of the effect of electron-electron collisions on medium properties at the level of fractional ionization typical of the HgBr(B )/HgBr 2 laser. PACS numbers: 42.55.Hq, 52.80. -s, 41.80.Dd FIG. I. Schematic illustration of the heated HgBr(B )/HgBr2 e-beam-controlled laser discharge cell. 7201