Abstract

Some years ago an optical pumping cycle has been designed to transfer via the solid state effect electron spin alignment to nuclei such as bromine and chlorine /1/. The obtained nuclear spin alignment can be destroyed by nuclear quadrupole resonance (NQR) transitions in the ground state of the molecule resulting in phosphorescence intensity changes. By this method the sensitivity of optical detection of magnetic resonance (ODMR) is obtained and NQR on quadrupole nuclei with concentrations as low as 10^-5 molar is feasible.

© 1984 Optical Society of America