摘要
利用氡220Rn半衰期的差别、氡220Rn及其子体释放的α粒子能量的差别以及220Rn子体产生初始带电荷的特性,研究了平行氡220Rn测量方法、吸收体法220Rn水平测量方法及驻极体灵敏测220Rn方法.这些方法在环境220Rn水平监测、介质表面220Rn出率的测量、室内220Rn及其子体分布测量中得到了应用.
The simultaneous radon & thoron monitoring method based on the difference of the half-life between radon and thoron,the thoron monitoring method with absorber based on the difference of the energy of α particles emitting from radon,thoron and their progenies,and the sensitive thoron monitoring method with electret based on the charged characteristics of thoron daughters are developed.The simultaneous method can be used to measure radon and thoron concentrations simultaneously;the thoron monitoring method with absorber can measure not only thoron exposure,but also the thoron exhalation rate released from the material surface directly.The sensitive method is of the advantage of higher sensitivity,and will be used widely for the environmental investigation,and for study of the characteristics of thoron and its progenies.
出处
《南华大学学报（自然科学版）》
2004年第4期7-13,共7页
Journal of University of South China：Science and Technology
基金
国家自然科学基金项目(10075083).
