studies of electron capture by multiply charged ions from molecules using translational energy spectroscopy研究用电子俘获的带电离子通过分子平动动能光谱学.pdfVIP

Int. J. Mol. Sci. 2002, 3, 162-175 International Journal of Molecular Sciences ISSN 1422-0067 © 2002 by MDPI /ijms/ Studies of Electron Capture by Multiply Charged Ions from Molecules using Translational Energy Spectroscopy D.M. Kearns, R.W. McCullough* and H.B. Gilbody Atomic and Molecular Physics Research Division, School of Mathematics and Physics, Queen’s University Belfast, Belfast BT7 1NN, N. Ireland, U.K. rw.mccullough@qub.ac.uk *Author to whom correspondence should be addressed. Received: 14 December 2001 / Accepted: 30 January 2002 / Published: 28 March 2002 Abstract: Both single (TES) and double (DTES) translational energy spectroscopy has been used to study one-electron capture processes by N2+, C2+, He2+, N5+, and O6+ ions in H2 and CO at energies 1keV/amu. The main excited product channels have been identified. In the case of He2+ in H and CO, one electron capture with dissociation becomes increas- 2 ingly important as the collision energy is decreased. In the case of N5+ in H , autoionising 2 double capture with dissociation is an important process at the lowest energies considered. All the measurements are in good agreement with theoretical predictions where available. Keywords: One electron capture, dissociative capture, multiply charged ions. Introduction Electron capture is