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Proceedings Paper

Vibrational effects in the (e,2e) ionization of diatomic targets by fast electron impact
Author(s): Boghos B. Joulakian; Philippe Weck
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Paper Abstract

Assuming similar electronic structure for hydrogen, deuterium and tritium diatomic molecules in the limits of the Born- Oppenheimer separation, we have undertaken a study of the differential cross section of the (e,2e) ionization of these three isotopes to show the influence of the vibrational motion in the ionization process. We have considered vertical transitions from the lowest vibrational state of the fundamental 1(Sigma) g state of the target to the vibrational levels of the fundamental 2(Sigma) g state of H2+, D2+ or T2+. The results obtained by two different approaches; one considering the inter-nuclear distance as a target variable just like electronic coordinates in the transition matrix element of the problem, and the second, considering the problem as a purely electronic transition modulated by the probability density of finding the diatomic system at a given inter-nuclear distance, show that vibrational effects could be important in high energy resolution (leV) experiments, and that, in the case of low resolution the two approaches present contradictory results, which could be elucidated by new experiments.

Paper Details

Date Published: 9 May 2001
PDF: 7 pages
Proc. SPIE 4243, Saratov Fall Meeting 2000: Laser Physics and Photonics; and Spectroscopy and Molecular Modeling, (9 May 2001); doi: 10.1117/12.426693
Show Author Affiliations
Boghos B. Joulakian, Institut de Physique (France)
Philippe Weck, Institut de Physique (France)

Published in SPIE Proceedings Vol. 4243:
Saratov Fall Meeting 2000: Laser Physics and Photonics; and Spectroscopy and Molecular Modeling
Vladimir L. Derbov; Leonid A. Melnikov; Lev M. Babkov, Editor(s)

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