Transfer of negative muons from hydrogen to argon in gaseous H₂+Ar mixtures at high pressure

Abstract

The transfer rate of negative muons from the 1s state of hydrogen to argon has been measured in H2+Ar gas mixtures at total pressures of 100 and 140 bar and argon concentrations C (Ar/H2) of 6*10-4 and 20*10-4. The reduced transfer rates have been found to be independent of the total pressure and of the argon concentration. The mean reduced transfer rate obtained, Lambda pAr=(1.46+or-0.05)*1011 s-1, is compared with the rates measured by other authors.