Rovibrational analysis of the XUV photodissociation of HeH+ ions
(2011) Physical review. A, Atomic, molecular, and optical physics — Vol. 84, n° 5, p. 53412 (2011)
Files
A8F09d01.pdf
Restricted Access - Adobe PDF
- 461.42 KB
Details
- Authors
- Abstract
- We investigate the dynamics of the photodissociation of the helium hydride ion HeH+ by XUV radiation with the aim to establish a detailed comparison with a recent experimental work carried out at the FLASH free electron laser using both vibrationally hot and cold ions. We determine the corresponding rovibrational distributions using a dissociative charge transfer setup and the same source conditions as in the FLASH experiment. Using a nonadiabatic time-dependent wave-packet method, we calculate the partial photodissociation cross sections for the n=1–3 coupled electronic states of HeH+. We find good agreement with the experiment for the cross section into the He + H+ dissociative channel. On the other hand, we show that the experimental observation of the importance of the electronic states with n>3 cannot be well explained theoretically, especially for cold (v=0) ions. We find a good agreement with the experiment on the relative contribution of the Σ and Π states to the cross section for the He+ + H channel, but only a qualitative one for the He + H+ channel. We discuss the factors that could explain the remaining discrepancies between theory and experiment.
- Affiliations
Institute for Theoretical Atomic, Molecular and Optical Physics Harvard-Smithsonian Center for Astrophysics, Cambridge, Massachusetts 02138, USA Université Libre de Bruxelles Laboratoire de Chimie Quantique et Photophysique
Citations
Loreau, J., Lecointre, J., Urbain, X., & Vaeck, N. (2011). Rovibrational analysis of the XUV photodissociation of HeH+ ions. Physical review. A, Atomic, molecular, and optical physics, 84(5), 53412. https://doi.org/10.1103/PhysRevA.84.053412 (Original work published 2011)