First observation of the hyperfine and superhyperfine structure of antiprotonic helium by laser-microwave spectroscopy

J. Sakaguchi, J. Eades, R. S. Hayano, M. Hori, D. Horváth, T. Ishikawa, B. Juhász, H. A. Torii, E. Widmann, H. Yamaguchi, T. Yamazaki

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Abstract

We have designed and developed a laser-microwave triple resonance spectroscopy experiment of antiprotonic helium to investigate its hyperfine (HF) and superhyperfine (SHF) structures. We succeeded in making microwave transitions between HF substates of the (n, l) = (37,35) metastable state, and resolved doublet resonance peaks split by SHFS. We determined the resonance frequencies with 30ppm precision. The experimental values agree with recent theoretical calculations, and to ∼ 60ppm level three-body QED theory is verified.

Original languageEnglish
JournalNuclear Physics A
Volume721
DOIs
Publication statusPublished - Jun 30 2003

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hyperfine structure
helium
microwaves
spectroscopy
lasers
metastable state

ASJC Scopus subject areas

  • Nuclear and High Energy Physics

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First observation of the hyperfine and superhyperfine structure of antiprotonic helium by laser-microwave spectroscopy. / Sakaguchi, J.; Eades, J.; Hayano, R. S.; Hori, M.; Horváth, D.; Ishikawa, T.; Juhász, B.; Torii, H. A.; Widmann, E.; Yamaguchi, H.; Yamazaki, T.

In: Nuclear Physics A, Vol. 721, 30.06.2003.

Research output: Contribution to journalArticle

Sakaguchi, J, Eades, J, Hayano, RS, Hori, M, Horváth, D, Ishikawa, T, Juhász, B, Torii, HA, Widmann, E, Yamaguchi, H & Yamazaki, T 2003, 'First observation of the hyperfine and superhyperfine structure of antiprotonic helium by laser-microwave spectroscopy', Nuclear Physics A, vol. 721. https://doi.org/10.1016/S0375-9474(03)01226-0
Sakaguchi, J. ; Eades, J. ; Hayano, R. S. ; Hori, M. ; Horváth, D. ; Ishikawa, T. ; Juhász, B. ; Torii, H. A. ; Widmann, E. ; Yamaguchi, H. ; Yamazaki, T. / First observation of the hyperfine and superhyperfine structure of antiprotonic helium by laser-microwave spectroscopy. In: Nuclear Physics A. 2003 ; Vol. 721.
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AU - Sakaguchi, J.

AU - Eades, J.

AU - Hayano, R. S.

AU - Hori, M.

AU - Horváth, D.

AU - Ishikawa, T.

AU - Juhász, B.

AU - Torii, H. A.

AU - Widmann, E.

AU - Yamaguchi, H.

AU - Yamazaki, T.

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