Populations and lifetimes in the v=n-ℓ-1=2 and 3 metastable cascades of p̄He+ measured by pulsed and continuous antiproton beams

M. Hori, J. Eades, E. Widmann, T. Yamazaki, R. S. Hayano, T. Ishikawa, H. A. Torii, T. Von Egidy, F. J. Hartmann, B. Ketzer, C. Maierl, R. Pohl, M. Kumakura, N. Morita, D. Horváth, I. Sugai

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Abstract

Using the laser spectroscopy, the time evolution of the state population in the v≡n-l=2 and 3 metastable cascades of antiprotonic helium atoms were studied. The effects of the collision between antiprotonic helium and the ordinary helium atoms on the atomic cascade were also analyzed. The measurements were done using the pulsed and continuous types of antiproton beams supplied by the Low Energy Antiproton Ring. The studies revealed five phases in the life history of the metastable antiprotonic helium.

Original languageEnglish
Article number012504
Pages (from-to)012504-1-012504-16
JournalPhysical Review A - Atomic, Molecular, and Optical Physics
Volume70
Issue number1
DOIs
Publication statusPublished - Jul 2004

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ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics

Cite this

Hori, M., Eades, J., Widmann, E., Yamazaki, T., Hayano, R. S., Ishikawa, T., Torii, H. A., Von Egidy, T., Hartmann, F. J., Ketzer, B., Maierl, C., Pohl, R., Kumakura, M., Morita, N., Horváth, D., & Sugai, I. (2004). Populations and lifetimes in the v=n-ℓ-1=2 and 3 metastable cascades of p̄He+ measured by pulsed and continuous antiproton beams. Physical Review A - Atomic, Molecular, and Optical Physics, 70(1), 012504-1-012504-16. [012504]. https://doi.org/10.1103/PhysRevA.70.012504