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Transfert de charge muonique

Arnaud Dupays 1
1 Théorie (LCAR)
LCAR - Laboratoire Collisions Agrégats Réactivité
Abstract : This work concerns muon transfer from muonic hydrogen to heavier atoms. Recently, a method of measurement of the hyperfine structure of ground-state muonic hydrogen based on the collision energy dependence of the muon transfer rate to oxygen has been proposed. This proposal is based on measurements which where performed at the Paul Scherrer Institut in the early ninetee's which indicate that the muon transfer from muonic hydrogen to oxygen increases by a factor of 4 going from thermal to 0.12 eV energies. The motivation of our calculations was to confirm this behaviour. To study the collision energy dependence of the muon transfer rate, we have used a time-independent close-coupling method. We have set up an hyperspherical elliptic formalism valid for nonzero total angular momentum which allows accurate computations of state-to-state reactive and charge exchange processes. We have applied this formalism to muon-tranfer process to oxygen and neon. The comparison with experimental results is in both cases excellent. Finally, the neon transfer rate dependence with energy suggests to use neon instead of oxygen to perform a measurement of the hyperfine structure of muonic hydrogen. The results of accurate calculations of the muon transfer rates from muonic protium and deuterium atoms to nitrogen, oxygen and neon are also reported. Very good agreement with measured rates is obtained and for the three systems, the isotopic effect is perfectly reproduced.
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https://tel.archives-ouvertes.fr/tel-00006442
Contributor : Arnaud Dupays <>
Submitted on : Monday, July 12, 2004 - 3:06:11 PM
Last modification on : Friday, February 28, 2020 - 1:52:03 PM
Long-term archiving on: : Friday, April 2, 2010 - 8:11:38 PM

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  • HAL Id : tel-00006442, version 1

Citation

Arnaud Dupays. Transfert de charge muonique. Physique Atomique [physics.atom-ph]. Université Paul Sabatier - Toulouse III, 2004. Français. ⟨tel-00006442⟩

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