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Quenching of metastable antiprotonic helium atoms in collisions with deuterium molecules

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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.

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Authors and Affiliations

  1. Institute of Nuclear Research of the Hungarian Academy of Sciences, 4001 Debrecen, Hungary, , , , , , HU

    B. Juhász

  2. CERN, 1211 Geneva 23, Switzerland, , , , , , CH

    J. Eades & M. Hori

  3. Department of Physics, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113, Japan, , , , , , JP

    R.S. Hayano, T. Ishikawa, J. Sakaguchi, E. Widmann & H. Yamaguchi

  4. KFKI Research Institute for Particle and Nuclear Physics, 1525 Budapest, Hungary, , , , , , HU

    D. Horváth

  5. Institute of Physics, University of Tokyo, 3-8-1 Komaba, Meguro-ku, Tokyo 153, Japan, , , , , , JP

    H.A. Torii

  6. RI Beam Science Laboratory, RIKEN, Wako, Saitama 351-0198, Japan, , , , , , JP

    T. Yamazaki

Authors
  1. B. Juhász
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  2. J. Eades
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  3. R.S. Hayano
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  4. M. Hori
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  5. D. Horváth
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  6. T. Ishikawa
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  7. J. Sakaguchi
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  8. H.A. Torii
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  9. E. Widmann
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  10. H. Yamaguchi
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  11. T. Yamazaki
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Received 6 July 2001

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Juhász, B., Eades, J., Hayano, R. et al. Quenching of metastable antiprotonic helium atoms in collisions with deuterium molecules. Eur. Phys. J. D 18, 261–266 (2002). https://doi.org/10.1140/epjd/e20020046

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  • DOI: https://doi.org/10.1140/epjd/e20020046

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