Abstract
The cosmic-ray muon lifetime was measured with a variety of counters designed to study both the free and μ− capture lifetimes. The data were obtained using scintillation detectors and a lead glass detector. These data show the dependence of μ− capture on the atomic number of the chemical element in the detector. The Z dependence of the weak interaction capture process is discussed in terms of the familiar Fermi (ΔJ=0) and Gamow–Teller (ΔJ=1) decays. This experiment was designed for use in advanced undergraduate physics laboratories.
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