冷中子反射材料中子散射核的研制

IF 16.4 1区 化学 Q1 CHEMISTRY, MULTIDISCIPLINARY Accounts of Chemical Research Pub Date : 2021-03-16 DOI:10.3233/jnr-210013
J. Granada, J. I. M. Dami'an, J. Dawidowski, J. Robledo, C. Helman, G. Romanelli, Goran vSkoro
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引用次数: 4

摘要

最新的中子散射应用是高强度限制技术,要求减少源和探测器之间的中子损耗。此外,核工业需要更精确的数据和程序来设计和优化先进的裂变反应堆,特别是在处理燃料和慢化剂材料方面。为了满足这些要求,有必要改进现有的计算工具,通过生成更好的模型来描述中子与感兴趣的系统的相互作用。巴里洛切原子中心(CNEA,阿根廷)的中子物理系一直在开发慢中子与材料相互作用的新模型,以产生散射核和热中子和冷中子能量区的截面数据。除了对中子减速剂的研究外,我们最近开始研究可以在这些能量范围内作为有效中子反射器的材料。在这项工作中,我们介绍了在VESUVIO光谱仪(ISIS, UK)上同时进行的金刚石纳米粉和氢化镁的透射和散射实验结果,并将它们与新生成的截面文库进行了比较。
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Development of neutron scattering kernels for cold neutron reflector materials
The newest neutron scattering applications are highly intensity-limited techniques that demand reducing the neutron losses between source and detectors. In addition, the nuclear industry demands more accurate data and procedures for the design and optimization of advanced fission reactors, especially for the treatment of fuel and moderator materials. To meet these demands, it is necessary to improve the existing calculation tools, through the generation of better models that describe the interaction of neutrons with the systems of interest. The Neutron Physics Department at Centro Atomico Bariloche (CNEA, Argentina) has been developing over the time new models for the interaction of slow neutrons with materials, to produce scattering kernels and cross section data in the thermal and cold neutron energy region. Besides the studies carried out on neutron moderators, we have recently begun looking at materials that could serve as efficient neutron reflectors over those energy ranges. In this work we present the results of transmission and scattering experiments on diamond nanopowder and magnesium hydride, carried out simultaneously at the VESUVIO spectrometer (ISIS, UK), and compare them with newly generated cross-section libraries.
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来源期刊
Accounts of Chemical Research
Accounts of Chemical Research 化学-化学综合
CiteScore
31.40
自引率
1.10%
发文量
312
审稿时长
2 months
期刊介绍: Accounts of Chemical Research presents short, concise and critical articles offering easy-to-read overviews of basic research and applications in all areas of chemistry and biochemistry. These short reviews focus on research from the author’s own laboratory and are designed to teach the reader about a research project. In addition, Accounts of Chemical Research publishes commentaries that give an informed opinion on a current research problem. Special Issues online are devoted to a single topic of unusual activity and significance. Accounts of Chemical Research replaces the traditional article abstract with an article "Conspectus." These entries synopsize the research affording the reader a closer look at the content and significance of an article. Through this provision of a more detailed description of the article contents, the Conspectus enhances the article's discoverability by search engines and the exposure for the research.
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