Optical detection of double electron-nuclear resonance in isolated nuclei of AI2O3:Cr3+ (0.02
Kazanskii S.A.
Double electron-nuclear resonance (DENR) in isolated Al nuclei is studied by using an optical detection method in the В x and B2 absorption lines of Cr3 + ions of A1203. This was achieved by pumping different transitions between the Zeeman sublevels of the ground state of an ensemble of Cr3 + ions that are bound by a weak exchange interaction /~10 ~3 cm ~1.