Electron paramagnetic resonance line shape investigation of the ~(29)Si hyperfine doublet of the E'_γ center in a-SiO_2

摘要

We report an experimental study by electron paramagnetic resonance (EPR) spectroscopy of the E'_γ center and of its hyperfine structure, consisting in a pair of lines split by 42 mT. Our results show that two types of E'_γ centers can be distinguished on the basis of the EPR line shapes of their main resonance line and hyperfine structure.