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Annals of Nuclear Science and Engineering最新文献

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Plasma physics and controlled nuclear fusion research conference proceedings 等离子体物理与受控核聚变研究会议论文集
Annals of Nuclear Science and Engineering Pub Date : 1974-05-01 DOI: 10.1016/0302-2927(74)90018-X
D. Dobrott
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引用次数: 1
The accurate fission cross-section of 239Pu from 0·005 eV to 0·1 eV and its reference value at 2200 m/s 得到了239Pu在0.005 ~ 0.1 eV范围内的精确裂变截面及其2200 m/s时的参考值
Annals of Nuclear Science and Engineering Pub Date : 1974-05-01 DOI: 10.1016/0302-2927(74)90011-7
A.J. Deruytter , W. Becker
{"title":"The accurate fission cross-section of 239Pu from 0·005 eV to 0·1 eV and its reference value at 2200 m/s","authors":"A.J. Deruytter ,&nbsp;W. Becker","doi":"10.1016/0302-2927(74)90011-7","DOIUrl":"10.1016/0302-2927(74)90011-7","url":null,"abstract":"<div><p>A precise measurement of the fission cross-section of <sup>239</sup>Pu was performed with a slow chopper at the Belgian BR2-reactor (energy range 0·000 to 0·1 eV). Simultaneous recordings of pulse-height and time-of-flight spectra of successively compared <sup>239</sup>Pu layers and standard elemental boron layers were made. The detection of the <sup>10</sup>B(<em>n</em>, <em>α</em>)<sup>7</sup>Li and <span><math><msup><mi></mi><mn>239</mn></msup><mtext>Pu</mtext><mtext>(n, ƒ)</mtext></math></span> reaction fragments is made with excellent pulse-height resolution in low geometry with a AuSi surface barrier detector. The separation between the pile-up tail produced by the α-particles of <sup>239</sup>Pu and the fission fragment energy-distribution was very good. The amount of <sup>10</sup>B in the elemental boron layers was determined by weighing in vacuum combined with careful chemical and isotopic analysis of witness foils. The relative amounts of <sup>10</sup>B were checked by neutron-counting in the geometry of the experiment. The amounts of <sup>239</sup>Pu on the fission foils were determined from precise low-geometry α-counting and the knowledge of the isotopic composition and α-half-life values. The α-activity was controlled before and after the measurements.</p><p>The fission cross-section was calculated in the energy-range from 0·005 to 0·1 eV and its absolute value deduced at 2200 m/s was 741·9 ± 3·4b. These cross-section values were used to calculate the Westcott <em>g</em><sub>/<em>tf</em></sub>-factor for a 20·44°C Maxwellian neutron distribution with as results <span><math><mtext>g</mtext><msub><mi></mi><mn>ƒ</mn></msub><mtext> = 1·0553 ± 0·0013</mtext></math></span>.</p></div>","PeriodicalId":100094,"journal":{"name":"Annals of Nuclear Science and Engineering","volume":"1 5","pages":"Pages 311-322"},"PeriodicalIF":0.0,"publicationDate":"1974-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0302-2927(74)90011-7","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"76487081","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: 8
A transmission method to measure capture rates in fast reactors 一种测量快堆俘获率的传输方法
Annals of Nuclear Science and Engineering Pub Date : 1974-05-01 DOI: 10.1016/0302-2927(74)90012-9
Dietmar Kuhn
{"title":"A transmission method to measure capture rates in fast reactors","authors":"Dietmar Kuhn","doi":"10.1016/0302-2927(74)90012-9","DOIUrl":"10.1016/0302-2927(74)90012-9","url":null,"abstract":"<div><p>A method is described to measure neutron capture rates of materials in a cavity in the center of a fast reactor. The method is based on neutron transmission through a probe of the material to be investigated and can be used also in zero power facilities. Some measurements were done for U-235 and for U-238. On account of the special detector used, it is limited, however, to sufficiently hard neutron energy spectra.</p></div>","PeriodicalId":100094,"journal":{"name":"Annals of Nuclear Science and Engineering","volume":"1 5","pages":"Pages 323-328"},"PeriodicalIF":0.0,"publicationDate":"1974-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0302-2927(74)90012-9","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77898415","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
Factors influencing the economical application of food irradiation proceedings of a panel on the technological factors involved in the economical application of food irradiation 影响食品辐照经济应用的因素有关食品辐照经济应用所涉及的技术因素的小组会议记录
Annals of Nuclear Science and Engineering Pub Date : 1974-05-01 DOI: 10.1016/0302-2927(74)90020-8
C.L. Comar
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引用次数: 0
Irradiation facilities for research reactors 研究反应堆的辐照设施
Annals of Nuclear Science and Engineering Pub Date : 1974-05-01 DOI: 10.1016/0302-2927(74)90019-1
W.L. Whittemore
{"title":"Irradiation facilities for research reactors","authors":"W.L. Whittemore","doi":"10.1016/0302-2927(74)90019-1","DOIUrl":"10.1016/0302-2927(74)90019-1","url":null,"abstract":"","PeriodicalId":100094,"journal":{"name":"Annals of Nuclear Science and Engineering","volume":"1 5","pages":"Page 345"},"PeriodicalIF":0.0,"publicationDate":"1974-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0302-2927(74)90019-1","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"75651411","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: 12
The total cross-section of natural uranium for fast neutrons in the energy range (0·8–9·0 MeV) 天然铀对能量范围(0.8 ~ 0.9 MeV)的快中子的总截面
Annals of Nuclear Science and Engineering Pub Date : 1974-05-01 DOI: 10.1016/0302-2927(74)90010-5
D.B.C.B. Syme , J.D. Kellie, J. McKeown , S.J. Hall, G.I. Crawford
{"title":"The total cross-section of natural uranium for fast neutrons in the energy range (0·8–9·0 MeV)","authors":"D.B.C.B. Syme ,&nbsp;J.D. Kellie,&nbsp;J. McKeown ,&nbsp;S.J. Hall,&nbsp;G.I. Crawford","doi":"10.1016/0302-2927(74)90010-5","DOIUrl":"10.1016/0302-2927(74)90010-5","url":null,"abstract":"<div><p>The total cross-section of natural uranium for fast neutrons in the energy range (0·8–9·0 MeV) has been measured with good resolution and statistical precision, using a time-of-flight spectrometer based on an electron linear accelerator as neutron source. The results are compared with other recent data, with the recommended ENDF/B III evaluation and with theoretical calculations.</p></div>","PeriodicalId":100094,"journal":{"name":"Annals of Nuclear Science and Engineering","volume":"1 5","pages":"Pages 305-309"},"PeriodicalIF":0.0,"publicationDate":"1974-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0302-2927(74)90010-5","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"81311557","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
Papers to be published 拟发表的论文
Annals of Nuclear Science and Engineering Pub Date : 1974-05-01 DOI: 10.1016/0302-2927(74)90022-1
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引用次数: 0
Current papers in nuclear energy 最新的核能论文
Annals of Nuclear Science and Engineering Pub Date : 1974-05-01 DOI: 10.1016/0302-2927(74)90021-X
{"title":"Current papers in nuclear energy","authors":"","doi":"10.1016/0302-2927(74)90021-X","DOIUrl":"https://doi.org/10.1016/0302-2927(74)90021-X","url":null,"abstract":"","PeriodicalId":100094,"journal":{"name":"Annals of Nuclear Science and Engineering","volume":"1 5","pages":"Pages 347-350"},"PeriodicalIF":0.0,"publicationDate":"1974-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0302-2927(74)90021-X","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"137399138","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
The effect of the anisotropic scattering on the thermal utilization factor 各向异性散射对热利用系数的影响
Annals of Nuclear Science and Engineering Pub Date : 1974-05-01 DOI: 10.1016/0302-2927(74)90014-2
N.I. Laletin, N.V. Sultanov, Yu.A. Vlasov, S.I. Koniaev
{"title":"The effect of the anisotropic scattering on the thermal utilization factor","authors":"N.I. Laletin,&nbsp;N.V. Sultanov,&nbsp;Yu.A. Vlasov,&nbsp;S.I. Koniaev","doi":"10.1016/0302-2927(74)90014-2","DOIUrl":"10.1016/0302-2927(74)90014-2","url":null,"abstract":"<div><p>In calculations of the thermal utilization factor for heterogeneous reactors the anisotropic scattering is taken into account usually in the transport and sometimes in the linear-anisotropic approximations. The work of Eccleston and McCormick make doubtful the generally accepted opinion that the second angular moment of the scattering kernel has little effect on the disadvantage factor in slab cells in nuclear reactors.</p><p>In the present work we have investigated the effect of the second and higher angular moments of the scattering kernel on the thermal utilization factor. The formulas appropriate for the qualitative analysis of the question under consideration are given and a set of cells was calculated by various methods. A disagreement between the data obtained and those reported by Eccleston and McCormick is shown.</p></div>","PeriodicalId":100094,"journal":{"name":"Annals of Nuclear Science and Engineering","volume":"1 5","pages":"Pages 333-338"},"PeriodicalIF":0.0,"publicationDate":"1974-05-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"https://sci-hub-pdf.com/10.1016/0302-2927(74)90014-2","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"85683639","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
Radiobiological applications of neutron irradiation, proceedings of a panel, Vienna. 6–10 December 1971 中子辐照的放射生物学应用，小组会议录，维也纳，1971年12月6-10日
Annals of Nuclear Science and Engineering Pub Date : 1974-05-01 DOI: 10.1016/0302-2927(74)90017-8
W.L. Whittemore
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引用次数: 0
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