Vibrational effects in the (e,2e) ionization of diatomic targets by fast electron impact

Boghos B. Joulakian; Philippe Weck

doi:10.1117/12.426693

9 May 2001 Vibrational effects in the (e,2e) ionization of diatomic targets by fast electron impact

Boghos B. Joulakian, Philippe Weck

Proceedings Volume 4243, Saratov Fall Meeting 2000: Laser Physics and Photonics; and Spectroscopy and Molecular Modeling; (2001) https://doi.org/10.1117/12.426693
Event: Saratov Fall Meeting 2000, 2001, Saratov, Russian Federation

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.

Citation Download Citation

Boghos B. Joulakian and Philippe Weck "Vibrational effects in the (e,2e) ionization of diatomic targets by fast electron impact", Proc. SPIE 4243, Saratov Fall Meeting 2000: Laser Physics and Photonics; and Spectroscopy and Molecular Modeling, (9 May 2001); https://doi.org/10.1117/12.426693

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