Hyperfine structure of the metastable p̄He+ atomcule revealed by a laser-induced (n, l) = (37, 35) → (38, 34) transition

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

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Abstract

A precise scan of the previously discovered laser-induced transition (n, l) = (37, 35) → (38, 34) in p̄He+ revealed a doublet structure with a separation of ΔνHF = 1.70 ± 0.05 GHz. This new type of "hyperfine" splitting is ascribed to the interaction of the antiproton orbital angular momentum and the electron spin.

Original languageEnglish
Pages (from-to)15-19
Number of pages5
JournalPhysics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics
Volume404
Issue number1-2
DOIs
Publication statusPublished - Jul 3 1997

Keywords

  • Antiprotonic helium
  • Atomcule
  • Exotic atom
  • Hyperfine splitting
  • Laser spectroscopy

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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    Widmann, E., Eades, J., Yamazaki, T., Torii, H. A., Hayano, R. S., Hori, M., Ishikawa, T., Kumakura, M., Morita, N., Sugai, I., Hartmann, F. J., Von Egidy, T., Ketzer, B., Maierl, C., Pohl, R., & Horváth, D. (1997). Hyperfine structure of the metastable p̄He+ atomcule revealed by a laser-induced (n, l) = (37, 35) → (38, 34) transition. Physics Letters, Section B: Nuclear, Elementary Particle and High-Energy Physics, 404(1-2), 15-19. https://doi.org/10.1016/S0370-2693(97)00538-8