V.S. Roganov

The μSR investigations on the phasotron at Dubna: The present and the future

After conversion of the LNP JINR phasotron new opportunities have been opened for μSR-research. A new round of investigations has begun since 1987. In this paper we present the summary of the results achieved and give some prospects for future investigations.

μSR-study of reactivity of substituent ions and point-like defects in quartz monocrystals

AbstractμSR-method has been used for studying reactions of muonium as an analogue of a light hydrogen isotope with impurity atoms and point-like defects. The relaxation rate of muonium polarization λMu was measured for 11 samples with different concentrations of impurity atoms and defects. The rate constants of reactions of muonium with Fe, Al, Li, Ba, Cu, Mn, Ti and Pb atoms in quartz were defined.

Measurement of the probability of atomic capture and depolarization of negative muons in high-temperature superconductors

The possibility of investigating high-temperature superconductors (HTSC) by the μSR method with negative muons is discussed in the paper. The results of measurement of the probability of negative muon capture by oxygen and residual polarization of muons in the 1s-state of oxygen in some HTSC at room temperature are reported.