Time-evolution of cascade processes of muonic atoms in hydrogen-helium mixtures

The time-dependence of the population of muonic hydrogen states in hydrogen -helium mixtures is calculated for principal quantum number n. The number o f muons transferred to helium nuclei is also He on time and determined. The dependence of the population of the ground state of muonic hydrogen q(1s)( He), target density and the helium concentration is also considered. The re sults are in agreement with recent experimental data. The comparison of the calculated yield of K lines of X-ray; in pure hydrogen and deuterium with experimental data indicates the essential role of the Coulomb deexcitation process. Possible Stark mixing is also analysed.