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Updated: Aug 1, 2026

Detection of Nitric Oxide and Superoxide Radical Anion by Electron Paramagnetic Resonance Spectroscopy from Cells using Spin Traps
Published on: August 18, 2012
Reactive collisions between CH+ and O-
A Le Padellec1, E M Staicu-Casagrande, T Nzeyimana
1LCAR UMR 5589, Université Paul Sabatier-Toulouse III, route de Narbonne 118 Batiment IIIR1b4, 31062 Toulouse Cedex 4 France. arnaud.lepadellec@irsamc.ups-tlse.fr
Abstract:
Integral cross sections were measured for two reactions occurring in CH+ + O- collisions: the formation of the carbon monoxide cation CO+ via a reactive ionization process and the formation of the (iso)formyl cation HCO+ (HOC+) via the associative ionization process. Both carbon monoxide and formyl cations are present in the interstellar medium, the latter one being quite abundant in dense clouds. Provided the oxygen anion would also be present in the interstellar environment, the large efficiency of the two reactive processes reported here would justify their inclusion in astrochemical models. The whole set of data was obtained by means of a merged-beam setup operating with keV beams.
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