Abstract
Oriented samples of nuclei are of profound utility in solid state, nuclear and particle physics. Among various methods in use for orienting nuclei, optical pumping of atoms in gases and beams is a relatively simple room-temperature method and has been used especially for achieving nuclear poldrization in alkaline and rare gas atoms. On the other hand, orientation of nuclei in solids by optical pumping has been scarcely investigated: although small polarization (10-3%) was obtained for protons in anthracene1) and 29Si in silicon2), achievement of significant nuclear polarization reported so far was, to our knowlidge, only for 189Tm in a crystal of Tœ2+ in CaF2 by Grant et ai.3) in 1968.
© 1988 Optical Society of America
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