Casanovas Ramon, Prieto Elena, Salvadó Marçal
Unitat de Física Mèdica, Facultat de Medicina i Ciències de la Salut, Universitat Rovira i Virgili, Reus, Tarragona, ES-43201 Spain.
Unitat de Física Mèdica, Facultat de Medicina i Ciències de la Salut, Universitat Rovira i Virgili, Reus, Tarragona, ES-43201 Spain.
Appl Radiat Isot. 2016 Dec;118:154-159. doi: 10.1016/j.apradiso.2016.09.001. Epub 2016 Sep 9.
The measurement of the ambient dose equivalent H*(10) with automatic real-time radioactivity monitors using gamma-ray spectrometry provides valuable information at short integration times and serves as an alternative to conventional peak analysis of spectra. In this paper, a full methodology for the calculation of this quantity using Monte Carlo (MC) simulations is described and applied to real spectrometric measurements with LaBr(Ce) scintillation detectors. The methodology involves the calculation of the fluence-to-H*(10) conversion factors and a method for obtaining the fluence from gamma-ray spectra. The combination of these two elements makes it possible to calculate the H*(10). The obtained results are compared with the H*(10) measurements of a Geiger-Müller (GM) detector. Finally, the necessary activity concentration to produce a certain increment on the H*(10) is discussed for some isotopes. This is used to discuss the analysis capabilities of the spectrometric detectors when compared to GM ones.
使用伽马射线能谱法的自动实时放射性监测器测量环境剂量当量H*(10)，可在短积分时间内提供有价值的信息，并可作为传统谱峰分析的替代方法。本文描述了一种使用蒙特卡罗(MC)模拟计算该量的完整方法，并将其应用于使用溴化镧(铈)闪烁探测器的实际能谱测量。该方法包括注量到H*(10)转换因子的计算以及从伽马射线谱获取注量的方法。这两个要素的结合使得计算H*(10)成为可能。将所得结果与盖革-弥勒(GM)探测器的H*(10)测量值进行了比较。最后，讨论了某些同位素产生H*(10)一定增量所需的活度浓度。这用于讨论与GM探测器相比时能谱探测器的分析能力。
