Exponential gap relation and the rotational inelasticity of H2---M systems

Gayatri, C. ; Sathyamurthy, N. (1980) Exponential gap relation and the rotational inelasticity of H2---M systems Chemical Physics, 48 (2). pp. 277-235. ISSN 0301-0104

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Related URL: http://dx.doi.org/10.1016/0301-0104(80)80053-X


Previously published values of state-to-state integral inelastic cross sections for the H2(Ji)—M (M=H, He, Li, Li+, H2, CO2) systems are fitted to the exponential gap relation for the rotational inelastic process to obtain the C value that reflects the magnitudes of relative cross sections. While the vibration of the rotor seems to have little influence, the C value is shown to decrease dramatically with increase in initial collision energy Ti, ΔC/ΔTi being larger at lower Ti for all systems analysed, in accord with the prediction of the surprisal synthesis of Procaccia and Levine. For the only case of H2(Ji)-Li+ for which results are available for several Ji, C decreases with increase in Ji or Ji(Ji + 1)). The C value predicted by Procaccia and Levine for H2=M systems falls within the range of C values calculated for the various collision partners. However, there is a noticeable change in C (albeit within a factor of two) with change in M, indicating that dynamical factors do play an important role in rotational inelastic processes.

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Deposited On:17 Jun 2011 05:18
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