Alpha-and beta-activities per unit volume of air due to radon (222Rn),thoron (220Rn) and their decay products were measu......

　　A new method of directly measuring 222Rn progeny in a workers lung using lung counting system is introduced.To calib......

目的对氡子体浓度与PM_(2.5)浓度的相关性进行初步研究。方法运用德国BWLM-Plus-s氡钍子体测量仪和南华NR-200A氡子体连续测量仪于......