Muonic Atom Formation by Muon Transfer Process in C₆H₆or C₆H₁₂and CCl₄Mixtures

Abstract

The negative muon transfer process in the liquid mixtures of C 6 H 6 or C 6 H 12 and CCl 4 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 C 6 H 6 + CCl 4 system is approximately 1.5 times higher than that in a C 6 H 12 + CCl 4 system. This result can be explained by assuming that the muon transfer rate for the carbon atoms of C 6 H 6 is higher than the rate for the carbon atoms of C 6 H 12. 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 C 6 H 6 and C 6 H 12 .