Abstract: As an important signature to judge nuclear explosion, accurate determination of the source and activity concentration of radioxenon isotopes is of great significance for implementing the Comprehensive Nuclear Test Ban Treaty (CTBT). During the time of nuclear explosion, the four most interested radioxenon isotopes were ^131mXe, ¹³³Xe, ^133mXe and ¹³⁵Xe. However, the radioxenon gas could be also observed at the monitoring station in the downwind direction of nuclear power plants and medical isotopes productions. Therefore, one of the most important problems in nuclear explosion monitoring is to distinguish between nuclear explosion and civilian sources of radionuclides. In this paper, the source of radioxenon and emission level of the relevant measurement results were collected, sorted out, and statistical analysis of the relevant rules were analyzed. And the monitoring technology of radioxenon and analysis technology of nuclear explosion were summarized in order to provide a theoretical reference for the judgment of nuclear explosion.

Key words: noble gas, radioxenon, emission level, nuclear explosion, medical isotope production, nuclear power plant