@article{3444784846054c139b26336b08b6ebc7,
title = "Hyperfine structure of the metastable {\=p}He+ atomcule revealed by a laser-induced (n, l) = (37, 35) → (38, 34) transition",
abstract = "A precise scan of the previously discovered laser-induced transition (n, l) = (37, 35) → (38, 34) in {\=p}He+ 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.",
keywords = "Antiprotonic helium, Atomcule, Exotic atom, Hyperfine splitting, Laser spectroscopy",
author = "E. Widmann and J. Eades and T. Yamazaki and Torii, \{H. A.\} and Hayano, \{R. S.\} and M. Hori and T. Ishikawa and M. Kumakura and N. Morita and I. Sugai and Hartmann, \{F. J.\} and \{Von Egidy\}, T. and B. Ketzer and C. Maierl and R. Pohl and D. Horv{\'a}th",
note = "Funding Information: We are indebted to the LEAR and PS staff at CERN for their tireless dedication to providing us with the antiproton beam, and to O.I. Kartavtsev, D. Bakalov and V.I. Korobov and for making their theoretical results available to us. The present work is supported by the Grants-in-Aid for Specially Promoted Research and for International Scientific Research of the Japanese Ministry of Education, Science and Culture, the German Bundesministerium f'tir Bildung, Wissenchaft, Forschung und Technologie and the Hungarian National Science Foundation. H.A.T. acknowledges the support of the Japan Society for the Promotion of Science.",
year = "1997",
month = jul,
day = "3",
doi = "10.1016/S0370-2693(97)00538-8",
language = "English",
volume = "404",
pages = "15--19",
journal = "Physics Letters B",
issn = "0370-2693",
publisher = "Elsevier B.V.",
number = "1-2",
}