Observation of the 1154.9 nm transition of antiprotonic helium

T. Kobayashi, D. Barna, R. S. Hayano, Y. Murakami, K. Todoroki, H. Yamada, A. Dax, L. Venturelli, N. Zurlo, D. Horváth, H. Aghai-Khozani, A. Sótér, M. Hori

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Abstract

The resonance transition (n, l) = (40, 36) → (41, 35) of the antiprotonic helium (He+) isotope at a wavelength of 1154.9 nm was detected by laser spectroscopy. The population of He+ occupying the resonance parent state (40, 36) was found to decay at a rate of 0.45 ± 0.04 μs-1, which agreed with the theoretical radiative rate of this state. This implied that very few long-lived He+ are formed in the higher-lying states with principal quantum number n 41, in agreement with the results of previous experiments.

Original languageEnglish
Article number245004
JournalJournal of Physics B: Atomic, Molecular and Optical Physics
Volume46
Issue number24
DOIs
Publication statusPublished - Dec 28 2013

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ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Condensed Matter Physics

Cite this

Kobayashi, T., Barna, D., Hayano, R. S., Murakami, Y., Todoroki, K., Yamada, H., Dax, A., Venturelli, L., Zurlo, N., Horváth, D., Aghai-Khozani, H., Sótér, A., & Hori, M. (2013). Observation of the 1154.9 nm transition of antiprotonic helium. Journal of Physics B: Atomic, Molecular and Optical Physics, 46(24), [245004]. https://doi.org/10.1088/0953-4075/46/24/245004