Quenching of metastable antiprotonic helium atoms in collisions with deuterium molecules

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

Abstract:

Quenching of metastable antiprotonic helium atoms in collisions with deuterium molecules has been studied using laser spectroscopy at CERN's new Antiproton Decelerator facility. The quenching cross-sections of the states (n, l )= (39, 36), (39, 37), and (39, 38) were determined from the decay rates of the states which were observed using the “deuterium-assisted inverse resonance” (DAIR) method. The results revealed a similar (n, l )-dependence of the quenching cross-sections as in the case of hydrogen but the values were smaller by a factor of ∼1.5.

PACS. 36.10.-k Exotic atoms and molecules (containing mesons, muons, and other unusual particles) – 42.62.Fi Laser spectroscopy – 34.20.Gj Intermolecular and atom-molecule potentials and forces 

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Copyright information

© EDP Sciences, Springer-Verlag, Società Italiana di Fisica 2002

Authors and Affiliations

  • B. Juhász
    • 1
  • J. Eades
    • 2
  • R.S. Hayano
    • 3
  • M. Hori
    • 2
  • D. Horváth
    • 4
  • T. Ishikawa
    • 3
  • J. Sakaguchi
    • 3
  • H.A. Torii
    • 5
  • E. Widmann
    • 3
  • H. Yamaguchi
    • 3
  • T. Yamazaki
    • 6
  1. 1.Institute of Nuclear Research of the Hungarian Academy of Sciences, 4001 Debrecen, HungaryHU
  2. 2.CERN, 1211 Geneva 23, SwitzerlandCH
  3. 3.Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113, JapanJP
  4. 4.KFKI Research Institute for Particle and Nuclear Physics, 1525 Budapest, HungaryHU
  5. 5.Institute of Physics, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153, JapanJP
  6. 6.RI Beam Science Laboratory, RIKEN, Wako, Saitama 351-0198, JapanJP

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