Three-Dimensional Nondestructive Isotope-Selective Tomographic Imaging of 208Pb Distribution via Nuclear Resonance Fluorescence
Three-Dimensional Nondestructive Isotope-Selective Tomographic Imaging of 208Pb Distribution via Nuclear Resonance Fluorescence
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DOI：
10.3390/app11083415
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发表时间：
2021-04
期刊：
影响因子：
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通讯作者：
K. Ali;H. Zen;H. Ohgaki;T. Kii;T. Hayakawa;T. Shizuma;H. Toyokawa;M. Fujimoto;Y. Taira;M. Katoh
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文献类型：
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作者：
K. Ali;H. Zen;H. Ohgaki;T. Kii;T. Hayakawa;T. Shizuma;H. Toyokawa;M. Fujimoto;Y. Taira;M. Katoh
核磁共振荧光透射法(NRF)与计算机层析成像(CT)相结合是核工程中不可缺少的一种新的同位素分布成像方法。我们进行了一项实验，以重建具有同位素选择性的富铅同位素棒(208Pb)的三维NRF-CT图像，以及一组不同的棒，包括插入圆柱形铝支架中的另一种富铅同位素(206Pb)、铁和铝棒。使用最大能量为5.528 MeV、束流尺寸为2 mm、通量密度为10光子·S−1·eV−1的激光康普顿散射伽马射线，该束流密度位于日本国立自然科学研究院分子科学研究所的同步辐射装置的BL1U束线上，激发出5.512 MeV的Jπ=1−能级。首次在水平面上获得了像元分辨率为4 mm的208Pb同位素分布的三维NRF-CT图像。
Combining the nuclear resonance fluorescence (NRF) transmission method with computed tomography (CT) can be a novel method for imaging the isotope distributions, which is indispensable in nuclear engineering. We performed an experiment to reconstruct a three-dimensional NRF-CT image with isotope selectivity of enriched lead isotope rods (208Pb) together with a set of different rods, including another enriched isotope (206Pb), iron, and aluminum rods, inserted into a cylindrical aluminum holder. Using a laser Compton scattering (LCS) gamma ray beam with a 5.528 MeV maximum energy, 2 mm beam size, and 10 photon·s−1·eV−1 flux density, which is available at the BL1U beamline in the ultraviolet synchrotron orbital radiation-III (UVSOR-III) synchrotron radiation facility at the Institute of Molecular Science at the National Institutes of Natural Sciences in Japan, and we excited the Jπ = 1− NRF level at 5.512 MeV in 208Pb. An isotope-selective three-dimensional NRF-CT image of the 208Pb isotope distribution was experimentally obtained for the first time with a pixel resolution of 4 mm in the horizontal plane.