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Further Possibilities for Measurements on the p̄p-System Using the Cyclotron Trap

  • E. Borie
  • P. Blüm
  • D. Gotta
  • H. Koch
  • H. Poth
  • L. M. Simons
  • M. Suffert
Part of the Ettore Majorana International Science Series book series (EMISS, volume 17)

Abstract

The cyclotron trap discussed earlier at this workshop1) is considered to offer an excellent means for the measurement of antiprotonic K-X-rays in hydrogen isotopes. Although it was originally designed to work with pressures as low as several Torr, thus eliminating all disturbing effects on the cascade (collisional Stark effect, chemical dissocitation, Coulomb deexcitation), subsequent studies have indicated that pressures as low as 10-3 Torr can be used. In this case, the p̄p-system can be considered as having been formed in vacuum. This results in a handy prepared system from which decay products can be studied. More than 90% of all antiprotons will reach the 2p-level, which serves then as a definite initial level for all succeeding processes such as annihilation processes or transitions to bound states of Nuclear type (Baryonium, Glue balls). In the following it will be shown that working with low pressure hydrogen gas in any case facilitates the experiments and enables us to perform new kinds of measurements which are not feasible with collision-disturbed high pressure p̄p-systems.

Keywords

Atomic State Hydrogen Isotope Nuclear State Annihilation Cross Section Annihilation Reaction 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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References

  1. 1.
    L.M. Simons, Status Report of Experiment PS 175, This WorkshopGoogle Scholar
  2. 2.
    D. Gotta, Contributed paper to this workshopGoogle Scholar
  3. 3.
    H. Orth, Private CommunicationGoogle Scholar
  4. 4.
    J. Korenmann, Sov. J. of Nucl. Phys. 21:398 (1975)Google Scholar
  5. 5.
    P. Blüm, H. Poth, L.M. Simons, Contributed paper to this workshopGoogle Scholar

Copyright information

© Plenum Press, New York 1984

Authors and Affiliations

  • E. Borie
    • 1
  • P. Blüm
    • 1
  • D. Gotta
    • 1
  • H. Koch
    • 1
  • H. Poth
    • 2
  • L. M. Simons
    • 1
  • M. Suffert
    • 3
  1. 1.Kernforschungszentrum Karlsruhe, Institut für Kernphysik und Institut für Experimentelle KernphysikUniversität KarlsruheW. Germany
  2. 2.Institut für KernphysikKernforschungszentrum KarlsruheW. Germany
  3. 3.Laboratoire de basses energiesCNRStrasbourgFrance

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