Excitation transfer between excited electronic states of the H2 molecule due to interaction with a CO2 Laser beam |
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| Authors: | B Dubreuil H W Drawin J Chapelle |
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| Institution: | 1. Centre de Recherche sur la Physique des Hautes Températures, C.N.R.S. et U.E.R.-Sciences Fondamentales et Appliquées, Université d'Orleans, F-45045, Orleans-Cédex, France
2. Association EURATOM-CEA Section Physique des Plasmas, Centre d'Etudes Nucléaires, B.P. No. 6, F-92260, Fontenay-aux-Roses, France
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| Abstract: | A spectroscopic study of the band systemsG 1 Σ g →B 1 Σ u andI 1 Π g →B 1 Σ u of H2 emitted by a glow discharge in H2 gas showed that the populations of theG 1 Σ g (v, J) states decrease for the benefit of theI 1 Π u (v′, J′) states when the discharge is irradiated by a powerful CO2 Laser beam (power density 70 kW/cm2). The effect is interpreted as an absorption process in which two Laser photons intervene according to the transition scheme:G 1 Σ g →B″1 Σ u →I 1 Π g. A change of the populations of excited electronic states should lead to a change of the populations of excited atomic states as well. |
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