Atomic capture of Μ−-mesons in chemical compounds

Research paper by J. S. Baijal, J. A. Diaz, S. N. Kaplan, R. V. Pyle

Indexed on: 13 Feb '08Published on: 13 Feb '08Published in: Il Nuovo Cimento (1955-1965)


Experimental studies of the relative Μ−-meson atomiccapture probabilities in the compounds CuO, Sb2O3, PbO, CuS, Sb2S3, PbS, and in the metallic solutions Ag0.58Li, CuAu0.18 have been made to test the predictions of the « Fermi-TellerZ-law ». In our experiment the capturing atom was identified by decomposing a compound lifetime curve obtained by detecting neutrons from Μ− capture. The measured atomic-capture ratios are: Cu/O = 6.14 ± 0.85, Sb/S = 1.64 ± 0.10, Sb/O = 1.86 ± 0.096, Pb/S = 2.87 ± 0.35, Pb/O = 4.56 ± 0.53, Ag/Li = 11.66 ± 3.39, Cu/S = 1.89 ± 0.18, Au/Cu = 0.34 ± 0.032.Assuming theZ-dependence of the atomic-capture probability can be expressed as proportional toZn (n being any positive or negative number), we find that our experimental results fall approximately in the rangen=1/2 ton=3/2, where n-1 corresponds to the theoretical prediction of Fermi and Teller.