Nuclear Techniques ›› 2015, Vol. 38 ›› Issue (3): 30503-030503.doi: 10.11889/j.0253-3219.2015.hjs.38.030503


Relative efficiency method based on multi-nuclide

HU Guangchun XIANG Yongchun WU Huailong LIU Xiaoya   

  1. (Institute of Nuclear Physics and Chemistry, China Academy of Engineering Physics, Mianyang 621900, China)
  • Received:2014-01-02 Revised:2014-12-13 Online:2015-03-10 Published:2015-03-09

Abstract: Background: In the non-destructive measurement, including the analysis of material composition of nuclear forensics, fission product analysis of nuclear terrorism event and large sample activation analysis, there is a big challenge for the detection efficiency calibration. Purpose: This paper analyzed the basic principle of the relative efficiency method of radiation samples with multi-nuclide, and established the relative efficiency fitting method for multi-nuclide. Methods: Through the peak information of the fission products from a special irradiated uranium sample, the efficiency fitting of dual-nuclide (parent-daughter nuclides) and three nuclides (no parent-daughter nuclides) was verified. Results: The study showed that the calibration factor of the self-calibration method with multi-nuclide was consistent with the factor of the parent-daughter nuclides’ decay in the error range of 2%. Conclusion: Results laid the foundation for the non-destructive analysis techniques of the radioactive samples with special shapes.

Key words: Relative efficiency, Multi-nuclide, Least square method