摘要
由于目前查明放射源核素种类及活度手段不多,本研究根据点源γ光子减弱原理得到公式,再利用手提式巡测γ谱仪对废弃放射源进行监测,实现了鉴定放射源种类和大致活度。结果表明,该废弃放射源活度约为4.0×10^(5)Bq,种类为不规则立体状的V类镭-226放射源。本研究的主要优势在于运算速度快,适用于处理并计算由不同类型的基本体构成的复杂几何空间辐射体的大致活度。
There are few methods to identify the type of the nuclear number of medical radioactive source and its activity monitoring at present.An equation(D(ε)=C(ε)B(ε,b)■)was deduced according Gamma photon attenuation principle.Portable patrol gamma spectrometer was used to monitor the wasted radioactive source to obtain its type and activity.The results showed that its activity was around 4.0×105Bq.Its type was irregularly stereoscopic V-type radium-226 source.The advantages of the method were fast calculation,which would be useful to calculate the activity of the complex geometric space radiator that is formed by different types of basic element.
作者
毕明亮
马程远
戴嘉斌
BI Ming-liang;MA Cheng-yuan;DAI Jia-bin(Radioactive Environmental Monitoring Center,Guangdong Geological Bureau Nuclear Industry,Guangzhou Guangdong 510800,China)
出处
《环境科学导刊》
2023年第6期92-96,共5页
Environmental Science Survey
关键词
医用放射源
活度鉴定
核素识别
点源γ光子减弱原理
medical radioactive source
activity monitoring
identification of nuclear number
gamma photon attenuation principle
