Korpach Ed, Mekarski Pawel, Ungar R Kurt
Health Canada, Radiation Protection Bureau, 775 Brookfield Rd., Ottawa, ON, Canada K1A 1C1
Health Canada, Radiation Protection Bureau, 775 Brookfield Rd., Ottawa, ON, Canada K1A 1C1.
Radiat Prot Dosimetry. 2014 Aug;160(4):277-82. doi: 10.1093/rpd/nct350. Epub 2014 Jan 6.
For the past 10 y Health Canada has operated a Fixed Point Surveillance Network of NaI(Tl) detectors across Canada. Deployed for both emergency response and daily monitoring of airborne radiation in the environment, a spectral stripping method allowed measurement of certain isotopes well below the ambient dose rate. These include (133)Xe, (135)Xe and (41)Ar, typical of emissions from operating nuclear reactors. In an effort to increase the number of isotopes measured at these low levels a new technique of spectral fitting using spectral templates is being implemented. However, this requires very accurate spectral templates that can be difficult or impossible to obtain empirically for environmental measurements of airborne radio-isotopes. Therefore, a method of efficiently using Monte Carlo techniques to create these templates was developed.
在过去十年里，加拿大卫生部在加拿大全境运营了一个碘化钠（铊）探测器定点监测网络。该网络用于应急响应以及环境中空气传播辐射的日常监测，一种能谱剥离方法可对远低于环境剂量率的某些同位素进行测量。这些同位素包括（133）氙、（135）氙和（41）氩，它们是运行中的核反应堆典型的排放物。为了增加在这些低水平下测量的同位素数量，正在实施一种使用能谱模板进行能谱拟合的新技术。然而，这需要非常精确的能谱模板，而对于空气传播放射性同位素的环境测量而言，通过经验获取这些模板可能很困难甚至无法实现。因此，开发了一种有效利用蒙特卡罗技术来创建这些模板的方法。
