Dynamics of muonic atom cascade in hydrogen-helium mixtures

The deexcitation of excited muonic protium and deuterium in the mixture of hydrogen and helium isotopes is considered. Methods of experimental determi nation of the probability of direct atomic muon capture by hydrogen and muo n transfer rates from excited muonic hydrogen to helium are proposed. Theor etical results for the population of the muonic atoms in the ground state, q(1s)(He), are compared with the existing experimental data. Results obtain ed for D-2 +( 3,4) He mixtures are of interest for investigation of nuclear fusion in d mu(3,4)He muonic molecules.