Carrazana González J, Cornejo Díaz N, Jurado Vargas M
Centre for Radiological Protection and Hygiene, Habana, Cuba.
Appl Radiat Isot. 2012 May;70(5):868-71. doi: 10.1016/j.apradiso.2012.01.015. Epub 2012 Feb 1.
We studied the applicability of the Monte Carlo code DETEFF for the efficiency calibration of detectors for in situ gamma-ray spectrometry determinations of ground deposition activity levels. For this purpose, the code DETEFF was applied to a study case, and the calculated (137)Cs activity deposition levels at four sites were compared with published values obtained both by soil sampling and by in situ measurements. The (137)Cs ground deposition levels obtained with DETEFF were found to be equivalent to the results of the study case within the uncertainties involved. The code DETEFF could thus be used for the efficiency calibration of in situ gamma-ray spectrometry for the determination of ground deposition activity using the uniform slab model. It has the advantage of requiring far less simulation time than general Monte Carlo codes adapted for efficiency computation, which is essential for in situ gamma-ray spectrometry where the measurement configuration yields low detection efficiency.
我们研究了蒙特卡罗代码DETEFF在用于现场γ射线能谱测定地面沉降活度水平的探测器效率校准方面的适用性。为此，将代码DETEFF应用于一个研究案例，并将四个地点计算得到的¹³⁷Cs活度沉降水平与通过土壤采样和现场测量获得的已发表值进行了比较。发现在所涉及的不确定性范围内，用DETEFF获得的¹³⁷Cs地面沉降水平与研究案例的结果相当。因此，代码DETEFF可用于利用均匀平板模型对现场γ射线能谱进行效率校准，以测定地面沉降活度。它具有比适用于效率计算的通用蒙特卡罗代码所需模拟时间少得多的优点，这对于测量配置产生低探测效率的现场γ射线能谱测定至关重要。
