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Formation of the muoniated ethyl radical in the gas phase

TitleFormation of the muoniated ethyl radical in the gas phase
Publication TypeJournal Article
Year of Publication2003
AuthorsPercival, PW, Brodovitch, JC, Arseneau, DJ, Senba, M, Fleming, DG
JournalPhysica B-Condensed Matter
Volume326
Pagination72-75
Date PublishedFeb
Type of ArticleProceedings Paper
ISBN Number0921-4526
Keywordsethyl, gas phase, MU-SR, muonium, muonium reaction, radical formation
Abstract

The precession signals of the muoniated ethyl radical have been studied as a function of ethene pressure in pure ethene, ethene/nitrogen mixtures and ethene/helium mixtures. The purpose was to investigate the kinetics and mechanism of the radical formation process. It is possible to fit the signal amplitudes with a model involving a single reaction step-Mu addition to ethene. However, the rate constant deduced from the model fit is significantly higher than the literature value for a thermal reaction, as determined by direct study of Mu decay in low partial pressures of ethene. The conclusion is that at partial pressures above 1 bar the reaction occurs before the incoming (beam) muons are fully thermalized. (C) 2002 Elsevier Science B.V. All rights reserved.

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