IAEA发布《应对核或辐射应急的医学物理师指南》出版物

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The discussion on gamma-rays characteristic peak interference correction method when analyzing radionuclide activity with gamma spectrometry
YANG Xiuyu1,MENG Jiqun1,LI Qingguang1,WEI Yingjing2
(1.404Company Limited,CNNC,Lanzhou732850;2.China Institute for Radiation Protection,Taiyuan030006) Abstract:Aiming at the problem of gamma-ray characteristic peak interference correction in gamma spectrometry during a CNNC Environmental monitoring labs comparison,this paper conducts measurement experiment of uranium,thorium,radium and potassium in soil.When calibrating the efficiency of the spectrometer with natural soil standard source,it is necessary to analyze whether the gamma-ray characteristic peaks are interfered by other rays,and correct the efficiency by modifying the Nuclide activity value when calculating efficiency.When analyzing the nuclide activity of the samples by Gamma-Vision software,the activity correction should be carried out if the nuclide activity calculated by different characteristic rays is quite different.The characteristic peaks(such as235U185.7keV,238U92.6keV)used in the calculation of nuclide activity are analyzed,the contribution of the interference peak to the measured energy spectrum(Overlapping Peak)activity is deducted.This method gives qualified238U,226Ra,232Th,40K and137Cs data in CNNC soil sample comparison.
Key words:gamma spectrometry;gamma-ray characteristic peak interference correct;Gamma-Vision software analysis method
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IAEA发布‘应对核或辐射应急的医学物理师指南“出版物
㊀㊀国际原子能机构(IAEA)最近发布出版物‘应对核或辐射应急的医学物理师指南“㊂核或辐射应急可以发生在任何地方㊁任何时间,保护受影响人员的健康和安全是当务之急㊂在没有辐射防护专家在场的情况下,如何确保包括医务人员在内的所有人得到保护?只有医学物理师有资格提供应急援助,但他们通常没有接受过应急准备和响应方面的培训㊂‘应对核或辐射应急的医学物理师指南“是IAEA为医学物理师提供的第一部应急和响应指南,为帮助填补这一空白供了具体细节,使临床合格的医学物理师能够在核或辐射事故期间有效地支持第一响应人员㊂该出版物还被压缩成配套的快速查阅袖珍导则㊂
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