Echo-spectroscopy of TLS of multi-well adiabatic potential for Pr~(3+) activator centers in Y_2SiO_5

摘要

Based on the investigation of the temperature dependence of the two-pulse phonon echo amplitude on the ~3H_(4<->)~3P_0 resonant optical transition of the Pr~(3+) doped ions in the Y_2SiO_5 crystal, unusual for crystals, low-temperature mechanisms of Pr~(3+) spectral line broadening caused by the interaction of doped ions with TLS have been found. The constants characterizing the interaction of the doped Pr~(3+) ions with phonons and TLS have been determined.