{"title":"石墨扩散测量中的冷中子效应","authors":"J.A. Dejuren, V.A. Swanson","doi":"10.1016/0368-3230(66)90128-5","DOIUrl":null,"url":null,"abstract":"<div><p>Diffusion-length measurements have been made in AGOT graphite as a function of transverse buckling. For bucklings greater than 3·5 x 10<sup>-3</sup> cm<sup>−2</sup> spectral equilibrium is not attained between a predominantly thermal neutron group and a cold neutron group beyond the Bragg cut-off. The presence of cold neutrons cause a distinct increase in the measured extrapolation length. A treatment is given for the variation of the steady-state diffusion length with buckling for a Maxwellian spectrum whose temperature is modified by leakage.</p></div>","PeriodicalId":100815,"journal":{"name":"Journal of Nuclear Energy. Parts A/B. Reactor Science and Technology","volume":"20 11","pages":"Pages 905-914"},"PeriodicalIF":0.0000,"publicationDate":"1966-11-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0368-3230(66)90128-5","citationCount":"0","resultStr":"{\"title\":\"Cold neutron effects in graphite diffusion measurements\",\"authors\":\"J.A. Dejuren, V.A. Swanson\",\"doi\":\"10.1016/0368-3230(66)90128-5\",\"DOIUrl\":null,\"url\":null,\"abstract\":\"<div><p>Diffusion-length measurements have been made in AGOT graphite as a function of transverse buckling. For bucklings greater than 3·5 x 10<sup>-3</sup> cm<sup>−2</sup> spectral equilibrium is not attained between a predominantly thermal neutron group and a cold neutron group beyond the Bragg cut-off. The presence of cold neutrons cause a distinct increase in the measured extrapolation length. A treatment is given for the variation of the steady-state diffusion length with buckling for a Maxwellian spectrum whose temperature is modified by leakage.</p></div>\",\"PeriodicalId\":100815,\"journal\":{\"name\":\"Journal of Nuclear Energy. Parts A/B. Reactor Science and Technology\",\"volume\":\"20 11\",\"pages\":\"Pages 905-914\"},\"PeriodicalIF\":0.0000,\"publicationDate\":\"1966-11-01\",\"publicationTypes\":\"Journal Article\",\"fieldsOfStudy\":null,\"isOpenAccess\":false,\"openAccessPdf\":\"https://sci-hub-pdf.com/10.1016/0368-3230(66)90128-5\",\"citationCount\":\"0\",\"resultStr\":null,\"platform\":\"Semanticscholar\",\"paperid\":null,\"PeriodicalName\":\"Journal of Nuclear Energy. Parts A/B. Reactor Science and Technology\",\"FirstCategoryId\":\"1085\",\"ListUrlMain\":\"https://www.sciencedirect.com/science/article/pii/0368323066901285\",\"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 Nuclear Energy. Parts A/B. Reactor Science and Technology","FirstCategoryId":"1085","ListUrlMain":"https://www.sciencedirect.com/science/article/pii/0368323066901285","RegionNum":0,"RegionCategory":null,"ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":null,"EPubDate":"","PubModel":"","JCR":"","JCRName":"","Score":null,"Total":0}
Cold neutron effects in graphite diffusion measurements
Diffusion-length measurements have been made in AGOT graphite as a function of transverse buckling. For bucklings greater than 3·5 x 10-3 cm−2 spectral equilibrium is not attained between a predominantly thermal neutron group and a cold neutron group beyond the Bragg cut-off. The presence of cold neutrons cause a distinct increase in the measured extrapolation length. A treatment is given for the variation of the steady-state diffusion length with buckling for a Maxwellian spectrum whose temperature is modified by leakage.
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