Étude du spectre en énergie des électrons éjectés de la molécule de gaz carbonique par impact d'atomes d'hélium dans les états 2 1S et 2 3S et de néon dans les états 3P2 et 3P0

Dans ce travail, nous étudions la distribution en énergie des ions CO+2 créés lors d'une interaction Ne* (3P0,3 P2)-CO2. Nous développons une procédure théorique permettant de démontrer l'existence de transferts d'énergie de vibration en énergie de translation et de réaliser une étude quantitative de ces transferts. Abstract. 2014 The energy distributions of CO+2 ions formed in the interaction Ne* (3P0,3 P2)-CO2 are investigated experimentally. A theoretical model for the process is developed. This allows us to demonstrate the existence of transfers of vibrational energy into translational kinetic energy and to evaluate the magnitudes of these transfers.

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CO 2 + (Ã–X̃ and B̃–X̃) emissions resulting from the He(2 3S)+CO2 Penning ionization

Endoh

Tsuji

Nishimura

1982

The Journal of Chemical Physics

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CO 2 + (Ã 2Πu–X̃ 2Πg) and CO2+ (B̃ 2Σu+−X̃ 2Πg) emissions produced from the He(2 3S)+CO2 Penning ionization have been observed in a flowing afterglow apparatus. The fluorescence branching ratio of the Ã 2Πu and B̃ 2Σu+ states, and the vibrational populations of the Ã state were determined as a function of helium pressure. The fluorescence branching ratio of the Ã and B̃ states was independent of the helium pressure at 0.5–1.0 Torr. Meanwhile, a significant relaxation was found for the vibrational distribution of the Ã state in the helium pressure range from 0.5 to 5 Torr. The unrelaxed vibrational distribution of the Ã state was determined from the 62 Ã–X̃ bands. The fluorescence branching ratio IA/IB was about four times larger than the initial population ratio of the Ã and B̃ states determined by electron spectroscopy, and the vibrational populations of the Ã state shifted to higher υ1′ levels (υ1′= 3,4, and 5). These discrepancies between the PIOS and PIES results have been interpreted as due to interelectronic state coupling between the B̃ and Ã states.

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Étude du spectre en énergie des électrons éjectés de la molécule de gaz carbonique par impact d'atomes d'hélium dans les états 2 1S et 2 3S et de néon dans les états 3P2 et 3P0

Cited by 5 publications

References 12 publications

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CO 2 + (Ã–X̃ and B̃–X̃) emissions resulting from the He(2 3S)+CO2 Penning ionization

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