Formation of H3+ in Collisions of H2+ with H2 Studied in a Guided Ion Beam Instrument. Issue 13 (3rd June 2020)

• Record Type: Journal Article
• Authors: Savić, Igor; Schlemmer, Stephan; Gerlich, Dieter
• Is Part Of: Chemphyschem. Volume 21:Issue 13(2020)
• Page Start: 1429
• Page End: 1435
• Publication Date: 2020-06-03
• Subjects: absolute integral cross sections -- guided ion beam technique -- hydrogen chemistry -- ion-molecule reactions -- plasma chemistry; Chemistry, Physical and theoretical -- Periodicals; 541.05
• DOI: 10.1002/cphc.202000258
• Languages: English
• ISSNs: 1439-4235

Abstract

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. Abstract : A new Guided Ion Beam apparatus has been used to study the reaction H2 + +H2 → H3 + +H. In contrast to previous recommendations, our results show that there is no steep decline of the cross section above ET =2 eV. A new analytical function is proposed.