M. Iwanowski et al., INVESTIGATION OF MUON STATES IN SILICON AND GERMANIUM BY FIELD-QUENCHING AND RF-MU-SR, Hyperfine interactions, 86(1-4), 1994, pp. 681-686
The temperature dependence of the three states of positive muons in th
e semiconductors with diamond structure (mu+ in diamagnetic state mu(d
) and paramagnetic muonium Mu and Mu) have been investigated on six S
i (pure, B and P doped) and four Ge (ultrapure, CZ-grown undoped, Ga a
nd Sb doped) single crystals by longitudinal field-quenching and radio
-frequency mu+SR. Clear evidence for the transition Mu --> mu(d) is f
ound. The influence of light-induced charge-carriers is shown to be qu
ite different in p- and n-type material.