MEASUREMENT OF THE MUON MASS BY CRITICAL MESIC X-RAY ABSORPTION. II. PROPORTIONAL COUNTER SPECTROMETRY

The advantages of proportional counters for a study of the critical absorption of the 88-kev 3D yields 2P transition of mesic phosphorus are given. Their use in measuring the absorption coefficients is described. Mesic x-ray spectra from a red phosphorus target were recorded with and without lead absorbers. A list of the experimental transmitted intensities for given absorber thickness and lead absorption curves corresponding to the assumed muon masses is given. (M.C.G.)