Development of PARMA: PHITS-based analytical radiation model in the atmosphere
Development of PARMA: PHITS-based analytical radiation model in the atmosphere
复制标题
DOI：
10.1667/rr1094.1
复制
发表时间：
2008-08-01
影响因子：
3.4
通讯作者：
Sihver, Lembit
中科院分区：
文献类型：
--
作者：
Sato, Tatsuhiko;Yasuda, Hiroshi;Sihver, Lembit
对大气中宇宙射线光谱的估计对于评估航空剂量至关重要。因此，我们通过使用PHITS代码对宇宙射线在大气中的传播进行蒙特卡罗模拟来计算这些光谱。模拟的准确性很好地验证了在各种条件下，甚至接近海平面的实验数据。在对模拟结果进行综合分析的基础上，提出了一个适用于20 km以下大气中任意位置的中子、质子、氦离子、μ子、电子、正电子和光子宇宙射线谱的解析模型。我们的模型，命名为PARMA，使我们能够快速计算宇宙辐射剂量的精度相当于蒙特卡罗模拟，这需要更多的计算时间。利用这些特性，PARMA能够提高宇宙射线照射剂量估计的准确性和效率，不仅适用于机组人员，而且适用于地面公众。(C)2008年，辐射研究协会。
Estimation of cosmic-ray spectra in the atmosphere has been essential for the evaluation of aviation doses. We therefore calculated these spectra by performing Monte Carlo simulation of cosmic-ray propagation in the atmosphere using the PHITS code. The accuracy of the simulation was well verified by experimental data taken under various conditions, even near sea level. Based on a comprehensive analysis of the simulation results, we proposed an analytical model for estimating the cosmic-ray spectra of neutrons, protons, helium ions, muons, electrons, positrons and photons applicable to any location in the atmosphere at altitudes below 20 km. Our model, named PARMA, enables us to calculate the cosmic radiation doses rapidly with a precision equivalent to that of the Monte Carlo simulation, which requires much more computational time. With these properties, PARMA is capable of improving the accuracy and efficiency of the cosmic-ray exposure dose estimations not only for aircrews but also for the public on the ground. (C) 2008 by Radiation Research Society.