Nuclear Science and Techniques

《核技术》(英文版) ISSN 1001-8042 CN 31-1559/TL     2018 Impact factor 0.961

Nuclear Science and Techniques ›› 2018, Vol. 29 ›› Issue (6): 85 doi: 10.1007/s41365-018-0417-x

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X-ray fluorescence microtomography based on polycapillaryfocused X-rays from laboratory source

Bing-Gang Feng 1,2  Fen Tao 1,2  Yi-Ming Yang 1,2  Tao Hu 1,2  Fei-Xiang Wang 1,2  Guo-Hao Du 1  Yan-Ling Xue 1 Ya-Jun Tong Tian-Xi Sun 3  Biao Deng 1  Ti-Qiao Xiao 1,2   

  1. 1 Shanghai Institute of Applied Physics, Chinese Academy of Sciences, Shanghai 201800, China
    2 University of Chinese Academy of Sciences, Beijing 100049, China
    3 Beijing Normal University, Beijing 100875, China
  • Contact: Ti-Qiao Xiao E-mail:xiaotiqiao@sinap.ac.cn
  • Supported by:

    This work was supported by National Key R & D Program of China (Nos. 2017YFA0206004 and 2017YFA0403800) and the National Natural Science Foundation of China (Nos. 11775297 and U1532118).

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Bing-Gang Feng, Fen Tao, Yi-Ming Yang, Tao Hu, Fei-Xiang Wang, Guo-Hao Du, Yan-Ling Xue, Ya-Jun Tong, Tian-Xi Sun, Biao Deng, Ti-Qiao Xiao. X-ray fluorescence microtomography based on polycapillaryfocused X-rays from laboratory source.Nuclear Science and Techniques, 2018, 29(6): 85     doi: 10.1007/s41365-018-0417-x

Abstract:

X-ray fluorescence microtomography (lXFCT) is a nondestructive analytical technique and has been widely used to nondestructively detect and quantify the elemental composition and distributions in samples. Usually, synchrotron radiation X-rays are used for lXFCT, due to its high flux density. In this paper, a laboratory-sourcebased lXFCT system was developed, in which a polycapillary lens is employed to focus the X-ray beam and improve the flux density. The maximum likelihood expectation maximization algorithm was used to reconstruct the computed tomography slices at a limited number of projections. The experimental results demonstrated that the developed system could reveal the elemental distribution inside the test sample, with an elemental sensitivity of 1000 ppm.

Key words: X-ray fluorescence microtomography, Polycapillary, Laboratory X-ray source