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arXiv 2110.05073physics.ins-detnucl-ex
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用多箔活化分析测量宽能区中子场

Measurements of neutron fields in a wide energy range using multi-foil activation analysis

D. Chiesa, C. Cazzaniga, M. Nastasi, M. Rebai, C. D. Frost, G. Gorini, S. Lilley, S. Pozzi, E. Previtali

摘要:

准确描述辐射源的中子场对于许多基于中子辐照的应用是至关重要的,例如需要精确剂量估计的辐射损伤测试。在这项工作中,我们提出了多箔活化技术在ROTAX和ChipIr束线的ISIS spiritus源,其特征在于缓和和unmoderated光谱,分别进行中子通量测量。我们选择了许多不同的活化反应,以涵盖广泛的能量范围,从热中子到非常快的中子高达约100兆电子伏。通过应用贝叶斯展开算法,我们证明了这种技术的有效性,在测量中子通量强度和能谱的精度和准确性。

英文摘要:

An accurate characterization of the neutron fields at spallation sources is crucial for many applications based on neutron irradiations, such as radiation damage tests that need a precise dose estimate. In this work we present the neutron flux measurements performed with the multi-foil activation technique in the ROTAX and ChipIr beamlines of the ISIS spallation source, characterized by moderated and unmoderated spectra, respectively. We selected many different activation reactions to cover a wide energy range, from thermal to very fast neutrons up to about 100 MeV. By applying a Bayesian unfolding algorithm, we demonstrate the effectiveness of this technique in measuring the neutron flux intensity and energy spectrum with precision and accuracy.

机构、总结、中文摘要均由AI分析而来,可能存在错误,请以论文正文为准。

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