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The Gamma-Ray Distribution From Oriented Cerium-141

By: Contributor(s): Publication details: [Gaithersburg, MD] : U.S. Dept. of Commerce, National Institute of Standards and Technology, 1962.Subject(s): Genre/Form: Online resources: Summary: The distribution of gamma-radiation emitted in the decay of Ce(141) 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 Ce(141) nuclei oriented in a polarized cerium ethylsulfate crystal have been made. The hyperfine constant for Ce(141) 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 Pr(141) is +0.068 ±0.008.
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/pmc/articles/PMC5312814/

The distribution of gamma-radiation emitted in the decay of Ce(141) 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 Ce(141) nuclei oriented in a polarized cerium ethylsulfate crystal have been made. The hyperfine constant for Ce(141) 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 Pr(141) is +0.068 ±0.008.

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