@article{217c4cb13c2b4140a67ff367ee78ba65,
title = "Populations and lifetimes in the v=n-ℓ-1=2 and 3 metastable cascades of {\=p}He+ measured by pulsed and continuous antiproton beams",
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.",
author = "M. Hori and J. Eades and E. Widmann and T. Yamazaki and Hayano, {R. S.} and T. Ishikawa and Torii, {H. A.} and {Von Egidy}, T. and Hartmann, {F. J.} and B. Ketzer and C. Maierl and R. Pohl and M. Kumakura and N. Morita and D. Horv{\'a}th and I. Sugai",
note = "Funding Information: We are indebted to the Proton Synchrotron division for providing a stable antiproton beam, and to the cryogenics laboratory for their help in manufacturing the helium target. The present work was supported by the Grants-in-Aid for Specially Promoted Research and for International Scientific Research of Monbukagakusho of Japan, the German Bundesministerium f{\"u}r Bildung, Wissenschaft, Forschung und Technologie, and the Hungarian National Science Foundation (T033079).",
year = "2004",
month = jul,
doi = "10.1103/PhysRevA.70.012504",
language = "English",
volume = "70",
pages = "012504--1--012504--16",
journal = "Physical Review A",
issn = "1050-2947",
publisher = "American Physical Society",
number = "1",
}