Decay of negative muons bound in Al-27

  title={Decay of negative muons bound in Al-27},
  author={A. Grossheim and R. Bayes and J. Bueno and P. Depommier and W. Faszer and M. Fujiwara and C. Gagliardi and D. Gill and P. Gumplinger and M. Hasinoff and R. Henderson and A. Hillairet and J. Hu and D. Koetke and G. M. Marshall and E. Mathie and R. Mischke and K. Olchanski and A. Olin and R. Openshaw and J. -M. Poutissou and R. Poutissou and V. Selivanov and G. Sheffer and B. Shin and T. Stanislaus and R. Tacik and R. Tribble},
  journal={Physical Review D},
  • A. Grossheim, R. Bayes, +25 authors R. Tribble
  • Published 2009
  • Physics
  • Physical Review D
  • We present the first measurement of the energy spectrum up to 70 MeV of electrons from the decay of negative muons after they become bound in {sup 27}Al atoms. The data were taken with the TWIST apparatus at TRIUMF. We find a muon lifetime of (864.6{+-}1.2) ns, in agreement with earlier measurements. The asymmetry of the decay spectrum is consistent with zero, indicating that the atomic capture has completely depolarized the muons. The measured momentum spectrum is in reasonable agreement with… CONTINUE READING
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