Experiments on nuclear orientation at very low temperatures I, Establishment of a method of nuclear alinement and its application to cobalt-60
- 21 January 1954
- journal article
- Published by The Royal Society in Proceedings of the Royal Society of London. Series A. Mathematical and Physical Sciences
- Vol. 221 (1145) , 170-188
- https://doi.org/10.1098/rspa.1954.0014
Abstract
Experiments have been carried out which demonstrate the possibilities of the method of ‘magnetic hyperfine-structure alinement’ for the orientation of nuclei. Single crystals of composition (1% Co, 12% Cu, 87% Zn) Rb2(SO4)2, 6H2O were cooled by adiabatic demagnetization to 0·01°K. The crystals contained a small quantity of radioactive 60Co, which decays by β-emission followed by two γ-rays in cascade. The anisotropic distribution of the γ-rays from the oriented 60Co nuclei was measured by an array of Geiger counters around the cryostat. The largest anisotropy observed was 33%, and the change in this anisotropy as the crystals warmed up to 1°K was fitted to theoretical curves where the only unknown parameter was the magnetic moment of 60Co, for which a value of 3·5 ± 0·5 nuclear magnetons was deduced.Keywords
This publication has 18 references indexed in Scilit:
- Polarizedγ-Rays from Nuclei Aligned at Low TemperaturesPhysical Review B, 1952
- CXXIX. The alignment of Cobalt 58Journal of Computers in Education, 1952
- Alignment of cobalt-60 nuclei at very low temperaturesPhysica, 1951
- Decay of 10.7-minCo60mPhysical Review B, 1951
- L. Hyperfine structure in paramagnetic salts and nuclear alignmentJournal of Computers in Education, 1951
- On the Spatial Alignment of NucleiProceedings of the Physical Society. Section A, 1951
- Angular Correlation of Successive Gamma-RaysPhysical Review B, 1950
- Internal Conversion inNi60Physical Review B, 1950
- Nuclear Specific Heats of Copper SaltsNature, 1949
- Attempts to detect alignment of atomic nucleiPhysica, 1949