高氡环境中氚监测电离室设计

Design on Tritium Monitoring Ionization Chamber Used in the Environment with High Radon Concentration

针对地下坑道等高氡环境中的氚监测问题,基于铝箔透射高能的α射线、屏蔽低能β射线的特性,提出了一种通过甄别氡释放α粒子和氚释放β粒子,实现高氡环境中氚监测的方案,通过实验与MC法验证了该方案的可行性。设计了双层电离室,对其能量沉积进行了计算,得到了不同位置和不同结构中的能量响应因子,为高氡环境下氚实时监测的系统的搭建提供了依据。

For the problem of tritium monitoring in underground tunnel with high radon concentration, based on the characteristics of aluminum foil to transmit high energy alpha particles and shield low energy beta alpha, a method for tritium real - time monitoring in the environment with high radon concentration based on energy dis- crimination principle is discussed, whose feasibility is verified by the M - C method and experiment. On this ba- sis, a kind of double ionization chamber is designed and the energy deposition was calculated, whose energy re- sponse factors of different position and different structures are obtained which provide the basis for the construe- tion of tritium real - time monitoring system used in high radon environment.