Muonic atom formation by muon transfer process in C₆H₆ or C₆H₁₂ and CCl₄ mixtures

The negative muon transfer process in the liquid mixtures of C₆H₆ or C₆H₁₂ and CCl₄ was studied to examine the chemical effect on the muon capture process through a muon transfer reaction from the muonic hydrogen atom. Muonic X-rays, which are emitted after the muon capture by carbon or chlorine atoms, were measured using high-purity germanium detectors. We found that the capture ratio of carbon atoms to chlorine atoms in a C₆H₆ + CCl₄ system is approximately 1.5 times higher than that in a C₆H₁₂ + CCl₄ system. This result can be explained by assuming that the muon transfer rate for the carbon atoms of C₆H₆ is higher than the rate for the carbon atoms of C₆H₁₂. This finding is consistent with our previous study on the pion transfer process in the same sample system, in which different pion transfer rates were obtained between C₆H₆ and C₆H₁₂. (author)