First observation of the negative muonium ion produced by electron capture in a beam-foil experiment

Y. Kuang, K. P. Arnold, F. Chmely, M. Eckhause, V. W. Hughes, J. R. Kane, S. Kettell, D. H. Kim, K. Kumar, D. C. Lu, B. Ni, B. Matthias, H. Orth, G. Zu Putlitz, H. R. Schaefer, P. A. Souder, K. Woodle

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Abstract

The negative muonium ion Mu-μ+e-e- has been produced by double electron pickup as a beam of positive muons passes through a foil. A clean signal was detected by electrostatically accelerating and analyzing the ions in a magnetic time-of-flight spectrometer. The Mu- beam at the focal plane of our spectrometer had an intensity 1.4×10-5 times that of the incident μ+ beam or 2 s-1, which corresponds to a Mu-/μ+ conversion probability of 0.5×10-4 at the foil in agreement with the calculated value. The kinetic energies of Mu- at the foil are less than several keV as expected.

Original languageEnglish (US)
Pages (from-to)3172-3175
Number of pages4
JournalPhysical Review A
Volume35
Issue number7
DOIs
StatePublished - Jan 1 1987

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

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    Kuang, Y., Arnold, K. P., Chmely, F., Eckhause, M., Hughes, V. W., Kane, J. R., Kettell, S., Kim, D. H., Kumar, K., Lu, D. C., Ni, B., Matthias, B., Orth, H., Zu Putlitz, G., Schaefer, H. R., Souder, P. A., & Woodle, K. (1987). First observation of the negative muonium ion produced by electron capture in a beam-foil experiment. Physical Review A, 35(7), 3172-3175. https://doi.org/10.1103/PhysRevA.35.3172