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arXiv 1010.3930nucl-ex
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IV型高精度($γ,n$)截面中子计数器的特性

Characterization of an INVS Model IV Neutron Counter for High Precision ($γ,n$) Cross-Section Measurements

C. W. Arnold, T. B. Clegg, H. J Karwowski, G. C. Rich, J. R. Tompkins, C. R. Howell

摘要:

设计用于放射性物质分析的中子计数器已被用于隧道实验室的束流实验。圆柱形的几何形状和60%的最大效率使它非常适合($γ,n$)截面测量中子发射阈值附近。一个高精度的计数器的特性已经取得了使用中子从几个来源。使用测量和模拟的组合,中子计数器的绝对探测效率被确定为在0.1和1 MeV之间的中子能量范围内的$\pm$ 3%的准确度。结果表明,这种效率表征是普遍有效的广泛的目标。

英文摘要:

A neutron counter designed for assay of radioactive materials has been adapted for beam experiments at TUNL. The cylindrical geometry and 60% maximum efficiency make it well suited for ($γ,n$) cross-section measurements near the neutron emission threshold. A high precision characterization of the counter has been made using neutrons from several sources. Using a combination of measurements and simulations, the absolute detection efficiency of the neutron counter was determined to an accuracy of $\pm$ 3% in the neutron energy range between 0.1 and 1 MeV. It is shown that this efficiency characterization is generally valid for a wide range of targets.

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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