Savić Igor, Schlemmer Stephan, Gerlich Dieter
Department of Physics, Faculty of Sciences, University of Novi Sad, Trg Dositeja Obradovića 4, Novi Sad, 21000, Serbia.
I. Physikalisches Institut, Universität zu Köln, Zülpicher Straße 77, Köln, 50937, Germany.
Chemphyschem. 2020 Jul 2;21(13):1429-1435. doi: 10.1002/cphc.202000258. Epub 2020 Jun 3.
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 H in collisions of H with H . 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.
