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Journal of Nuclear Energy最新文献

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Expansion of editorial coverage and service toc ontributors and readers of journal of nuclear energy 扩大《核能》杂志的编辑范围和对投稿人和读者的服务
Journal of Nuclear Energy Pub Date : 1973-06-01 DOI: 10.1016/0022-3107(73)90090-7
John P. Howe (Executive Editor), M.M.R. Williams (Executive Editor)
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引用次数: 0
Neutron capture cross-section of 135Xe 135Xe的中子俘获截面
Journal of Nuclear Energy Pub Date : 1973-06-01 DOI: 10.1016/0022-3107(73)90095-6
D.C. Santry, R.D. Werner
{"title":"Neutron capture cross-section of 135Xe","authors":"D.C. Santry,&nbsp;R.D. Werner","doi":"10.1016/0022-3107(73)90095-6","DOIUrl":"10.1016/0022-3107(73)90095-6","url":null,"abstract":"<div><p>The neutron capture cross-section of <sup>135</sup>Xe has been measured by the activity depletion method using mass separated-ion implanted samples and high resolution gamma-ray spectrometry. An effective cross-section value was measured at a neutron temperature of 318 ± 5°K as 3·09 ± 0·07 Mbarns, relative to a <sup>59</sup>(Co(<em>n</em>,<em>γ</em>) cross section of 37·09 barns. A calculated value for the <sup>135</sup>Xe 2200 m/sec capture cross-section is discussed.</p></div>","PeriodicalId":100811,"journal":{"name":"Journal of Nuclear Energy","volume":"27 6","pages":"Pages 409-413"},"PeriodicalIF":0.0,"publicationDate":"1973-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-3107(73)90095-6","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73835332","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 5
Prompt ν-values of 235U and 239Pu in some fast reactor spectra 某些快堆光谱中235U和239Pu的提示ν值
Journal of Nuclear Energy Pub Date : 1973-06-01 DOI: 10.1016/0022-3107(73)90094-4
L. Widén, H. Condé
{"title":"Prompt ν-values of 235U and 239Pu in some fast reactor spectra","authors":"L. Widén,&nbsp;H. Condé","doi":"10.1016/0022-3107(73)90094-4","DOIUrl":"https://doi.org/10.1016/0022-3107(73)90094-4","url":null,"abstract":"<div><p>The averaged number of prompt neutrons per <sup>335</sup>sU and <sup>239</sup>Pu fission have been measured in fast and thermalized neutron fluxes at the fast zero-power reactor (FRO) at Studsvik, Sweden. The measurements were made with three different reactor cores giving median fission energies for <sup>235</sup>U (core centre) of 50, 170 and 240 keV. The spectrum averaged v data were compared with the corresponding thermal <span><math><mtext>ν</mtext></math></span> data. The <span><math><mtext>ν</mtext><mtext>-</mtext><mtext>value</mtext></math></span> of the spontaneous fission of <sup>252</sup>Cf was used as an intermediate standard. The fission samples were placed in neutron beams extracted from the reactor cores and a large liquid scintillator was used as the fission neutron detector. The experiment also included relative fission rate measurements, <sup>238</sup>U/<sup>235</sup>U, for the three reactor cores.</p><p>The results are compared with calculated relative <span><math><mtext>ν</mtext><mtext>-</mtext><mtext>values</mtext></math></span> deduced from different sets of recently evaluated fission cross section and <span><math><mtext>ν</mtext><mtext>-</mtext><mtext>data</mtext></math></span> and from different assumptions concerning the reactor neutron spectra. Within the experimental one standard deviation errors of 1·5 and 2 per cent for <sup>235</sup>U and <sup>239</sup>Pu a good agreement was obtained between the experimental and calculated data assuming <span><math><mtext>ν</mtext><mtext>-</mtext><mtext>values</mtext></math></span> in the fission resonance region equal to <span><math><mtext>ν</mtext></math></span> at thermal energy.</p></div>","PeriodicalId":100811,"journal":{"name":"Journal of Nuclear Energy","volume":"27 6","pages":"Pages 395-407"},"PeriodicalIF":0.0,"publicationDate":"1973-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-3107(73)90094-4","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"92013023","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
A message from the past editor-in-chief 前任主编的留言
Journal of Nuclear Energy Pub Date : 1973-06-01 DOI: 10.1016/0022-3107(73)90091-9
J.V. Dunworth
{"title":"A message from the past editor-in-chief","authors":"J.V. Dunworth","doi":"10.1016/0022-3107(73)90091-9","DOIUrl":"https://doi.org/10.1016/0022-3107(73)90091-9","url":null,"abstract":"","PeriodicalId":100811,"journal":{"name":"Journal of Nuclear Energy","volume":"27 6","pages":"Page III"},"PeriodicalIF":0.0,"publicationDate":"1973-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-3107(73)90091-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"92128602","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
First flight escape probability for a spherical shell with an empty central region 中心区域为空的球壳的首次飞行逃逸概率
Journal of Nuclear Energy Pub Date : 1973-06-01 DOI: 10.1016/0022-3107(73)90096-8
T. Lefvert
{"title":"First flight escape probability for a spherical shell with an empty central region","authors":"T. Lefvert","doi":"10.1016/0022-3107(73)90096-8","DOIUrl":"10.1016/0022-3107(73)90096-8","url":null,"abstract":"<div><p>First flight transport kernels are derived for a spherical shell region where the central zone is empty. Assuming a uniformly distributed, isotropic source throughout the annulus the uncollided angular flux distribution is obtained enabling the formulation of the current at any point in the medium. It is shown that the current at the outer radius of the shell, and therefore also the escape probability <em>P</em><sub><em>e</em></sub> of the shell, can be put in a simple analytical form. Numerical values of <em>P</em><sub><em>e</em></sub> are given for different inner radii and different shell thicknesses and comparison is made with the escape probabilities for spherical shells with a black central region. Finally, an upper limit is given for the relative error introduced in a shell collision probability by the common assumption of a perfectly absorbing inner zone.</p></div>","PeriodicalId":100811,"journal":{"name":"Journal of Nuclear Energy","volume":"27 6","pages":"Pages 415-423"},"PeriodicalIF":0.0,"publicationDate":"1973-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-3107(73)90096-8","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"74666050","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Calculations on the scattering of keV neutrons from the 7Li (p, n) 7Be reaction in a typical target assembly 典型靶组件中7Li (p, n) 7Be反应keV中子散射的计算
Journal of Nuclear Energy Pub Date : 1973-06-01 DOI: 10.1016/0022-3107(73)90092-0
T.B. Ryves
{"title":"Calculations on the scattering of keV neutrons from the 7Li (p, n) 7Be reaction in a typical target assembly","authors":"T.B. Ryves","doi":"10.1016/0022-3107(73)90092-0","DOIUrl":"10.1016/0022-3107(73)90092-0","url":null,"abstract":"<div><p>The angular distributions and energy spectra of keV neutrons scattered from a typical target assembly employing the <sup>7</sup>Li (<em>p</em>, <em>n</em>) <sup>7</sup>Be reaction have been calculated by the Monte Carlo method for several proton energies, target backing and beam tube wall thicknesses and target radii. A brief discussion is given of possible errors due to scattering in the experimental measurements of neutron activation capture cross-sections, dose equivalents and angular distributions.</p></div>","PeriodicalId":100811,"journal":{"name":"Journal of Nuclear Energy","volume":"27 6","pages":"Pages 365-376"},"PeriodicalIF":0.0,"publicationDate":"1973-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-3107(73)90092-0","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"79536131","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 7
Conference announcement 会议公告
Journal of Nuclear Energy Pub Date : 1973-06-01 DOI: 10.1016/0022-3107(73)90099-3
{"title":"Conference announcement","authors":"","doi":"10.1016/0022-3107(73)90099-3","DOIUrl":"https://doi.org/10.1016/0022-3107(73)90099-3","url":null,"abstract":"","PeriodicalId":100811,"journal":{"name":"Journal of Nuclear Energy","volume":"27 6","pages":"Page 440"},"PeriodicalIF":0.0,"publicationDate":"1973-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-3107(73)90099-3","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"92013021","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"OA","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Prompt of 235U and 239Pu in some fast reactor spectra 235U和239Pu在某些快堆光谱中的提示
Journal of Nuclear Energy Pub Date : 1973-06-01 DOI: 10.1016/0022-3107(73)90094-4
L. Widén, H. Condé
{"title":"Prompt of 235U and 239Pu in some fast reactor spectra","authors":"L. Widén, H. Condé","doi":"10.1016/0022-3107(73)90094-4","DOIUrl":"https://doi.org/10.1016/0022-3107(73)90094-4","url":null,"abstract":"","PeriodicalId":100811,"journal":{"name":"Journal of Nuclear Energy","volume":"13 1","pages":"395-407"},"PeriodicalIF":0.0,"publicationDate":"1973-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"84039926","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 0
Direct solutions of time-dependent neutron slowing down problems using numerical laplace transforms—I. Infinite media 用数值拉普拉斯变换直接解时变中子减速问题[j]。无限的媒体
Journal of Nuclear Energy Pub Date : 1973-06-01 DOI: 10.1016/0022-3107(73)90097-X
T.D. Beynon, M. Coleman
{"title":"Direct solutions of time-dependent neutron slowing down problems using numerical laplace transforms—I. Infinite media","authors":"T.D. Beynon,&nbsp;M. Coleman","doi":"10.1016/0022-3107(73)90097-X","DOIUrl":"10.1016/0022-3107(73)90097-X","url":null,"abstract":"<div><p>A direct numerical inversion of the Laplace transform of the time-variable is used to produce the time-dependence of an infinite medium neutron field. Comparisons with exact solutions show that excellent agreement can be obtained by suitable scaling of the time variable. The examples chosen are slowing down in natural iron and slowing down and up-scattering in light water.</p></div>","PeriodicalId":100811,"journal":{"name":"Journal of Nuclear Energy","volume":"27 6","pages":"Pages 425-433"},"PeriodicalIF":0.0,"publicationDate":"1973-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-3107(73)90097-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"90099472","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
Neutron multiplicity measurement on resolved fission resonances of 235U 235U裂变共振的中子多重度测量
Journal of Nuclear Energy Pub Date : 1973-06-01 DOI: 10.1016/0022-3107(73)90098-1
J.P. Theobald, J.A. Wartena, R. Werz, F. Poortmans
{"title":"Neutron multiplicity measurement on resolved fission resonances of 235U","authors":"J.P. Theobald,&nbsp;J.A. Wartena,&nbsp;R. Werz,&nbsp;F. Poortmans","doi":"10.1016/0022-3107(73)90098-1","DOIUrl":"10.1016/0022-3107(73)90098-1","url":null,"abstract":"<div><p>Neutron induced fission events emitting 2, 3, 4 or 5 neutrons have different contributions to fission yields recorded with double and triple neutron coincidence signals as a function of incoming neutron energy. This fact can be used to search for variations of neutron multiplicities in fission resonances, in particular in resonances of different channel spins.</p><p>In the case of <sup>235</sup>U no difference in fission neutron numbers for 3<sup>−</sup> and 4<sup>−</sup> levels has been detected above the experimental error of ± 1·5 %.</p></div>","PeriodicalId":100811,"journal":{"name":"Journal of Nuclear Energy","volume":"27 6","pages":"Pages 435-439"},"PeriodicalIF":0.0,"publicationDate":"1973-06-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0022-3107(73)90098-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83126013","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
引用次数: 1
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