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Formation of H 3 + in Collisions of H 2 + with H 2 Studied in a Guided Ion Beam Instrument
Author(s) -
Savić Igor,
Schlemmer Stephan,
Gerlich Dieter
Publication year - 2020
Publication title -
chemphyschem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.016
H-Index - 140
eISSN - 1439-7641
pISSN - 1439-4235
DOI - 10.1002/cphc.202000258
Subject(s) - ion , atomic physics , beam (structure) , beam energy , collision , ion beam , chemistry , physics , nuclear physics , optics , computer security , computer science , organic chemistry
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 3 + in collisions of H 2 + with H 2 . 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.