Exp. No.

M1272 — Approved

Title of Experiment

A Study of the Kinetics of the 4Heμ0 + CH4 Reaction

Spokesperson(s) for Group

Current Members of Group

Name Institution Status % of research time devoted to experiment
D.G. Fleming UBC Chemistry Professor Emeritus 50%
D.J. Arseneau TRIUMF Research Scientist 20%
J.H. Brewer University of BC Professor 15%


The study of kinetic isotope effects in reaction rate chemisty has a long history, and has traditionally involved comparisons of the rates of H and D-atoms. At TRIUMF, pioneering research has been carried out establishing the muonium (Mu) atom, with a mass of only 0.113 amu, as an important very light isotope of the H-atom. This has now been extended to the other end of the mass scale with the muonic He (4Heu) atom, with a mass of 4.11 amu, making it the heaviest H-atom isotope. This proposal is concerned with measurements of the rates of the 4Heu + CH4 reaction.