Experimental study of \(\mu\)--atomic and \(\mu\)--molecular processes in pure helium and deuterium--helium mixtures

We present experimental results of \(\mu\)--atomic and \(\mu\)--molecular processes induced by negative muons in pure helium and helium--deuterium mixtures. The experiment was performed at the Paul Scherrer Institute (Switzerland). We measured muonic x--ray \(K\) series transitions relative intensit...

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Bibliographic Details
Published in:arXiv.org 2003-12
Main Authors: Bystritsky, V M, Boreiko, V F, Czapliński, W, Filipowicz, M, Gerasimov, V V, Huot, O, Knowles, P E, Mulhauser, F, Pavlov, V N, Popov, N P, Schaller, L A, Schneuwly, H, Sandukovsky, V G, Stolupin, V A, Volnykh, V P, Woźniak, J
Format: Article
Language:English
Subjects:
Deuterium
Helium
Muons
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Summary:We present experimental results of \(\mu\)--atomic and \(\mu\)--molecular processes induced by negative muons in pure helium and helium--deuterium mixtures. The experiment was performed at the Paul Scherrer Institute (Switzerland). We measured muonic x--ray \(K\) series transitions relative intensities in \((\mu{}^{3,4}\mathrm{He})^*\) atoms in pure helium as well as in helium--deuterium mixture. The muon stopping powers ratio between helium and deuterium atoms and the \(d \mu{}^3 \mathrm{He}\) radiative decay probability of for two different helium densities in \(\mathrm{D}_2 + {}^3\mathrm{He}\) mixture were also determined. Finally, the \(\mathrm{q}_{1s}^{\mathrm{He}}\) probability for a \(d\mu\) atom formed in an excited state to reach the ground state was measured and compared with theoretical calculations using a simple cascade model.
ISSN:2331-8422