{"title":"取向铈-141的伽马射线分布","authors":"J. Schooley, D. D. Hoppes, A. T. Hirshfeld","doi":"10.6028/jres.066A.031","DOIUrl":null,"url":null,"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.","PeriodicalId":94340,"journal":{"name":"Journal of research of the National Bureau of Standards. Section A, Physics and chemistry","volume":"76 1","pages":"317 - 320"},"PeriodicalIF":0.0000,"publicationDate":"1962-07-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":"6","resultStr":"{\"title\":\"The Gamma-Ray Distribution From Oriented Cerium-141\",\"authors\":\"J. Schooley, D. D. Hoppes, A. T. Hirshfeld\",\"doi\":\"10.6028/jres.066A.031\",\"DOIUrl\":null,\"url\":null,\"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.\",\"PeriodicalId\":94340,\"journal\":{\"name\":\"Journal of research of the National Bureau of Standards. Section A, Physics and chemistry\",\"volume\":\"76 1\",\"pages\":\"317 - 320\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1962-07-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"\",\"citationCount\":\"6\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of research of the National Bureau of Standards. Section A, Physics and chemistry\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://doi.org/10.6028/jres.066A.031\",\"RegionNum\":0,\"RegionCategory\":null,\"ArticlePicture\":[],\"TitleCN\":null,\"AbstractTextCN\":null,\"PMCID\":null,\"EPubDate\":\"\",\"PubModel\":\"\",\"JCR\":\"\",\"JCRName\":\"\",\"Score\":null,\"Total\":0}","platform":"Semanticscholar","paperid":null,"PeriodicalName":"Journal of research of the National Bureau of Standards. Section A, Physics and chemistry","FirstCategoryId":"1085","ListUrlMain":"https://doi.org/10.6028/jres.066A.031","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
The Gamma-Ray Distribution From Oriented Cerium-141
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.
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