The optically detected magnetic resonance of pure and doped silver bromide

Optically detected magnetic resonance spectra of pure and doped crystals of AgBr have been obtained at liquid helium temperatures. The free-electron g-value was found to be 1.49. This resonance is eliminated by electron-trapping dopants and enhanced by Cd 2+ and Pb 2+ . A resonance at g=2.08 has been assigned as the free-hole resonance. This resonance is enhanced by electron-trapping dopants and by Cd 2+ and Pb 2+ . Two strong resonances were found at g-values of 1.81 and 1.76. These resonances are thought to be from carriers trapped at intrinsic sites.