Measurement of the formation rate and the radiative decay of the muonic molecules [Formula Presented] and [Formula Presented]

S. Tresch, F. Mulhauser, C. Piller, L. A. Schaller, L. Schellenberg, H. Schneuwly, Y. A. Thalmann, A. Werthmüller, P. Ackerbauer, W. H. Breunlich, M. Cargnelli, B. Gartner, R. King, B. Lauss, J. Marton, W. Prymas, J. Zmeskal, C. Petitjean, M. Augsburger, D. ChatellardJ. P. Egger, E. Jeannet, T. von Egidy, F. J. Hartmann, M. Mühlbauer, W. Schott

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Abstract

Formation and decay of the [Formula Presented] and [Formula Presented] molecules have been studied in binary-gas mixtures of [Formula Presented] and [Formula Presented] at 30 K. The muon ground-state transfer rates from hydrogen to the two helium isotopes were extracted from the time distribution of the 7-keV decay x rays of the muonic hydrogen-helium molecules, measured with a Ge detector. The obtained transfer rates are [Formula Presented] and [Formula Presented] The radiative branching ratios of the decay of the [Formula Presented] and [Formula Presented] molecules were determined by comparing the yields of the Lyman series of muonic hydrogen with the one of the 7-keV line with charge-coupled-device detectors. The ratios are in agreement with theoretical predictions. Muon transfer from excited states of muonic hydrogen to both helium isotopes was also observed.

Original languageEnglish
Pages (from-to)3528-3536
Number of pages9
JournalPhysical Review A
Volume58
Issue number5
DOIs
StatePublished - 1998

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