Abstract
In the present work we discuss the dynamical processes guiding the relaxation of the internal rotational energy of three diatomic ions, the para-H2+, the ortho-D2+ and the HD+ in collision with He atoms. The state-changing cross sections and rates for these Molecular Hydrogen Ions (MHIs) are obtained from Close Coupling quantum dynamics calculations and the decay times into their respective ground states are computed by further solving the relevant time-evolution equations. The comparison of the results from the three molecules allows us to obtain a detailed understanding, and a deep insight, on the relative efficiencies of the relaxation processes considered.Graphical abstract
Highlights
THE EUROPEAN PHYSICAL JOURNAL DInelastic cross sections, rates and cooling times for para-H+2 , ortho-D+2 and HD+ in cold helium gas
The marked improvements on the performances of the field of cold chemistry research which have occurred in the last few years have allowed an increasingly wider range of studies for ion-neutral chemical processes involving charge-exchange chemistry [1,2] and radiative association mechanisms [3]
For the cases that we shall study in the present work, i.e. three molecular hydrogen ions (MHIs): paraH+2, ortho-D+2 and HD+, there is an additional interest provided by the fact that such conceptually simple oneelectron molecules can be used as testing ground of fundamental physics [10]
Summary
Inelastic cross sections, rates and cooling times for para-H+2 , ortho-D+2 and HD+ in cold helium gas. Mario Hernandez Vera, Stephan Schiller, Roland Wester, and Francesco Antonio Gianturco1,a 1 Institut fur Ionenphysik und Angewandte Physik, Universitat Innsbruck, Technikerstr. 25/3, 6020 Innsbruck, Austria 2 Institut fur Experimentalphysik, Heinrich-Heine Universitat Dusseldorf, Universtatsstr. Received 27 November 2016 Published online 18 May 2017 c The Author(s) 2017. This article is published with open access at Springerlink.com
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