The gamma-ray distribution from oriented cerium-141
- 1 July 1962
- journal article
- Published by National Institute of Standards and Technology (NIST) in Journal of Research of the National Bureau of Standards Section A: Physics and Chemistry
- Vol. 66A (4) , 317-320
- https://doi.org/10.6028/jres.066a.031
Abstract
The distribution of gamma-radiation emitted in the decay of Ce141 nuclei alined in neodymium ethylsulfate single crystals has been remeasured for temperatures as low as 0.0162 °K and has been found to be considerably more anisotropic than previously thought. The discrepancy is explained on the basis of preferential scattering of the plane-polarized radiation in the Dewar system. Similar measurements with Ce141 nuclei oriented in a polarized cerium ethylsulfate crystal have been made. The hyperfine constant for Ce141 in the neodymium ethylsulfate lattice is deduced as A =0.0305±0.003 cm−1, and the E2/M1 ratio for the 145-kev gamma ray in Pr141 is +0.068 ±0.008.Keywords
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