A New Measurement of the Muon Capture Rate in Liquid Hydrogen

  • J. Duclos
Part of the Ettore Majorana International Science Series book series (volume 4)


The muon capture rate in hydrogen is a fundamental weak process, particularly sensitive to the pseudo-scalar coupling constant: Fp. Its measurement is very difficult for various reasons1):
  1. i)

    The capture rate is very small compared to the decay rate.

  2. ii)

    The capture rate depends strongly on the initial hyperfine state which has to be known exactly in order to interpret the result.

  3. iii)

    The hydrogen must be extremely pure because of the high cross section for muons to be transferred to deuterium or nuclei.

  4. iv)

    In all the previous experiments the 5 MeV neutron, produced by the reaction, had to be detected amongst an intense background of electrons and γ rays due to muon decays. The main limitation comes from the neutron detector efficiency which has to be computed by sophisticated Monte-Carlo programmes.



Capture Rate Liquid Hydrogen Muon Decay High Cross Section Pulse Shape Discrimination 
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Copyright information

© Plenum Press, New York 1980

Authors and Affiliations

  • J. Duclos
    • 1
  1. 1.DPh-N/HECentre d’Etudes Nucléaires de SaclayGif-sur-YvetteFrance

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