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X-rays from antiprotonic3He and4He

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Zeitschrift für Physik A Hadrons and Nuclei

Abstract

Antiprotonic X-rays from the helium isotopes have been observed at pressures of 36, 72, 375 and 600 mbar. The antiproton beam from LEAR with momenta of 309 and 202 MeV/c has been stopped at these pressures using the cyclotron trap. The X-rays were detected with Si (Li) and intrinsic Ge semiconductor detectors. Absolute X-ray yields were determined and the strong-interaction 2p shifts and the 2p and 3d broadenings measured to be ɛ2p=(−17±4) eV, Γ2p=(25±9) eV and Γ3d=(2.14 ±0.18) meV for ¯p3He and ɛ2p=(-18±2) eV, Γ2p =(45±5) eV and Γ3d=(2.36±0.10) meV for ¯p4He.

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Authors and Affiliations

  1. Institut für Kernphysik und Institut für Experimentelle Kernphysik der Universität, Kernforschungszentrum Karlsruhe GmbH, Postfach 3640, W-7500, Karlsruhe 1, Federal Republic of Germany

    M. Schneider, R. Bacher, P. Blüm, D. Gotta, K. Heitlinger, W. Kunold & D. Rohmann

  2. Paul Scherrer Institut, CH-5232, Villigen (PSI), Switzerland

    J. Egger & L. M. Simons

  3. CERN, CH-1211, Geneva 23, Switzerland

    K. Elsener

Authors
  1. M. Schneider
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  2. R. Bacher
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  3. P. Blüm
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  4. D. Gotta
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  5. K. Heitlinger
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  6. W. Kunold
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  7. D. Rohmann
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  8. J. Egger
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  9. L. M. Simons
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  10. K. Elsener
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Additional information

The efforts of the LEAR staff and the help of P. Gauss from the CERN Cryogenic Group as well as the technical assistance of M. Dröge and M. Stoll are gratefully acknowledged. This work is part of the Ph.D. of one of us (M.S.), University of Karlsruhe (1987), KfK report no. 4222.

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Schneider, M., Bacher, R., Blüm, P. et al. X-rays from antiprotonic3He and4He. Z. Physik A - Hadrons and Nuclei 338, 217–222 (1991). https://doi.org/10.1007/BF01284797

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  • DOI: https://doi.org/10.1007/BF01284797

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