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The inelastic collisions of He(1s2p 1 P 1 ) atoms with ground-state noble-gas atoms are studied using the kinetic plasma spectroscopy method. Quenching rate constants are found to be (25+or-5)*10 -10 , (27+or-5)*10 -10 and (32+or-5)*10 -10 cm 3 s -1 for Ar, Kr and Xe, respectively (T=600 K). A detailed theoretical interpretation taking the specific features of quasimolecular terms into account is developed. Good agreement between theory and experiment is obtained for He-Ar and He-Kr. Possible reasons for the discrepancy for the He-Xe system are discussed.
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Devdariani et al. (1987) studied this question.
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