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Experimental investigation of the muon transfer reaction from deuterium to helium isotopes |
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| Authors: | Gartner B Ackerbauer P Breunlich W H Cargnelli M Fischer A Kammel P King R Kminek G Lauss B Marton J Prymas W Steininger E Zmeskal J Petitjean C Chatellard D Egger J -P Jeannet E Hartmann F J Kosak A Mühlbauer M von Egidy T Piller C Schaller L A Schellenberg L Schneuwly H Thalmann Y -A Tresch S Werthmüller A |
| Institution: | (1) Institute for Medium Energy Physics, Austrian A cademy of Sciences, Boltzmanngasse 3, A-1090 Vienna, Austria;(2) Paul Scherrer Institut, CH-5232 Villigen, Switzerland;(3) Institut de Physique de l'Université, CH-2000 Neuchâtel, Switzerland;(4) Physics Department, Technical University of Munich, D-85748 Garching, Germany;(5) Institut de Physique de l'Université, Pérolles, CH-1700 Fribourg, Switzerland;(6) Present address: University of California and L. Berkeley Laboratory, 94720, CA, USA |
| Abstract: | Muon transfer from the ground state of muonic deuterium to a helium atom proceeds mainly via the formation of a muonic molecule in an excited state. A large number of decay X rays ( 6.8 keV) from these (dµHe)* molecules were observed for the4He as well as for the3He case. The time distributions of these X rays allow the determination of the ground state transfer rate. The simultaneous employment of Ge/Si-detectors and CCDs for the same target conditions allows the determination of the branching ratio of radiative to nonradiative decay for the first time. |
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