NUCLEAR-QUADRUPOLE-RESONANCE MEASUREMENT OF THE AL-27 FROZEN CORE IN YALO3PR3+

Nuclear-quadrupole-resonance measurements of four Al-27 frozen-core sites in YAl03:Pr3+ in near-zero external static field are reported. The measurements were made by observing the effect of a weak radio-frequency magnetic field resonant with the Al-27 nucleus on the Pr-141 nuclear-quadrupole echo. The echoes were detected optically using a Raman heterodyne method. Most of the resonance lines show a doubling that is attributed to a magnetic field produced by the Pr-141(3+) enhanced nuclear moment as the doublet separation is dependent on the nuclear sublevels of the Pr-141(3+) ion used in the measurement.