Large microcalorimeter arrays for high-resolution X- and gamma-rayspectroscopy
Large microcalorimeter arrays for high-resolution X- and gamma-rayspectroscopy
复制标题
用于高分辨率 X 射线和伽马射线光谱学的大型微热量计阵列
DOI：
10.1016/j.nima.2010.09.154
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发表时间：
2011
影响因子：
1.4
通讯作者：
L. Vale
中科院分区：
文献类型：
--
作者：
A. Hoover;N. Hoteling;M. Rabin;J. Ullom;D. Bennett;P. Karpius;D. Vo;W. Doriese;G. Hilton;R. Horansky;K. Irwin;V. Kotsubo;D. Lee;L. Vale
微量热计探测器为X射线和软伽马射线的测量提供了前所未有的能量分辨率。在100keV区域的能量分辨率可以比平面高纯锗（HPGe）探测器好一个数量级。该技术非常适合分析具有复杂光谱的材料，这些光谱呈现出密集的峰。一个应用领域是为保障和燃料循环应用测量和分析核材料。在本文中，我们讨论了256像素阵列的操作和性能，并提出了一个头对头的同位素测定测量与高纯度锗使用钚标准的比较结果。我们表明，一个单一的测量的不确定性是较小的微量热计的数据相比，HPGe的数据时，峰面积相等。我们确定了几个关键领域，分析代码可以优化，这将可能导致微量热仪性能的改善。
Microcalorimeter detectors provide unprecedented energy resolution for the measurement of X-rays and soft gamma-rays. Energy resolution in the 100keV region can be up to an order of magnitude better than planar high-purity germanium (HPGe) detectors. The technology is well-suited to analysis of materials with complex spectra presenting closely spaced photopeaks. One application area is the measurement and assay of nuclear materials for safeguards and fuel cycle applications. In this paper, we discuss the operation and performance of a 256-pixel array, and present results of a head-to-head comparison of isotopic determination measurements with high-purity germanium using a plutonium standard. We show that the uncertainty of a single measurement is smaller for the microcalorimeter data compared to the HPGe data when photopeak areas are equal. We identify several key areas where analysis codes can be optimized that will likely lead to improvement in the microcalorimeter performance.