Formation of H3+ in Collisions of H2+ with H2 Studied in a Guided Ion Beam Instrument |
| |
| Authors: | Prof. Dr. Igor Savić Prof. Dr. Stephan Schlemmer Prof. Dr. Dieter Gerlich |
| |
| Affiliation: | 1. Department of Physics, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 4, Novi Sad, 21000 Serbia;2. I. Physikalisches Institut, Universität zu Köln, Zülpicher Straße 77, Köln, 50937 Germany;3. Physikalisches Institut, Technische Universität Chemnitz, Reichenhainer Straße 70, Chemnitz, 09107 Germany |
| |
| Abstract: | In order to study collisions between ions and neutrals, a new Guided Ion Beam (GIB) apparatus, called NOVion, has been assembled and tested. The primary purpose of this instrument is to measure absolute cross sections at energies relevant for technical or inter- and circumstellar plasmas. New and improved results are presented for forming H3+ in collisions of H2+ with H2. Between 0.1 eV and 2 eV, our measured effective cross sections are in good overall agreement with most previous measurements. However, at higher energies, our results do not show the steep decline, recommended in the standard literature. After critical evaluation of all experimental and theoretical data, a new analytical function is proposed, describing properly the dependence of the title reaction on the collision energy up to 10 eV. |
| |
| Keywords: | absolute integral cross sections guided ion beam technique hydrogen chemistry ion-molecule reactions plasma chemistry |
|
|
