【摘要】 当137Cs和90Sr-90Y两个放射源混合时,就会产生混合的β放射性强度。文中寻求一种测量与分析手段来获取两个源混合状态下分别产生的β放射性强度。首先,进行137Cs及90Sr-90Y源混合β放射性能谱测量,再运用费米-居里描绘法对数据进行分析、分解等。在费米-居里描绘上可绘出高、低能区的面积,通过它们各自面积中的粒子数积分就可获得137Cs及90Sr-90Y源分别产生的β放射性强度。137Cs源的强度P=1 346.93 Bq、90Sr-90Y源的强度P=385.47 Bq。更多还原

【Abstract】 When 137 Cs and Sr- Y two radioactive sources are mixed,it will produce a mixture of β radioactivity. This paper is seeking a measurement and analysis means to obtain the two sources β radioactive intensity respectively in mixed state. First,we measure the137 Cs and90Sr-90 Y source mixed β radioactive intensity,then use Fermi- Curie depicted method to analyze the mixed- measurement data of β spectroscopy. Fermi- Curie depicted can drawn the area of high and low energy region,thereafter by utilizing the integral sum on the number of particles in their respective area,the137 Cs and90Sr-90 Y source generated beta radioactivity can be obtained. The137 Cs source P = 1 346. 93( Bq),Sr- Y source intensity P = 385. 47( Bq).更多还原