On line nuclear orientation: A rapidly developing technique

Nuclear orientation facilities are operating fully on-line to acclerators/isotope separators capable of producing wide ranges of radioisotopes. The lowest on-line base temperatures are close to 7 mK and the shortest half-life yet studied is 0·9 s. Experimental results yield magnetic dipole interaction strengths, nuclear spin-lattice relaxation times, directional distributions of alpha, beta and gamma emissions and gamma ray linear polarization. Nuclear magnetic resonance has been observed on-line.The broad range of the technique in opening up systematic measurements of nuclear magnetic moments and excited state structures is stressed, illustrated by examples from current work.