RADIATION PROTECTION ›› 2026, Vol. 46 ›› Issue (5): 377-386.doi: 10.27045/j.1000-8187.202605001

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Progress of metrological techniques for naturally occurring radon isotopes

XIAO Detao1, LIANG Juncheng2, HE Zhengzhong1, TANG Quan1   

  1. 1. School of Nuclear Science and Technology, Hunan Provincial Key Laboratory of Radon, University of South China, Hunan Hengyang 421001;
    2. National Institute of Metrology,Beijing 100029
  • Received:2026-06-15 Published:2026-10-28

Abstract: Radon isotope metrological techniques are the important guarantee for the reliability of the measurement results of environmental radon isotopes and their daughters. This article introduces the current development status of radon isotope sources, and the metrological techniques of radon, thoron and radon exhalation rate, summarizes the performance characteristics of radon isotope sources, radon chambers, thoron chambers and radon exhalation rate standard devices in various countries, and points out some challenges in radon isotope metrological techniques.

Key words: radon, thoron, radon exhalation rate, metrological technique

CLC Number: 

  • TL84