Development of a calculation method for estimating specific energy distribution in complex radiation fields
Development of a calculation method for estimating specific energy distribution in complex radiation fields
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DOI：
10.1093/rpd/ncl407
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发表时间：
2006-12-01
影响因子：
1
通讯作者：
Niita, Koji
中科院分区：
文献类型：
--
作者：
Sato, Tatsuhiko;Watanabe, Ritsuko;Niita, Koji
估算人体暴露于复杂辐射场下的比能量分布对于规划长期空间任务和重离子癌症治疗具有重要意义。为了开发一种估算工具，我们利用蒙特卡罗技术计算了几个能量高达100 GeV n−1的HZE粒子轨道周围液态水中的比能量分布。在模拟中，假设目标为直径为1 nm ~ 1 μm的球形位点。为了在较宽的能量范围内预测各种重离子的分布，建立了一个可以再现模拟结果的解析函数。将该函数引入粒子和重离子输运编码系统（PHITS），使我们能够在较短的计算时间内计算出复杂辐射场中的比能量分布。
Estimation of the specific energy distribution in a human body exposed to complex radiation fields is of great importance in the planning of long-term space missions and heavy ion cancer therapies. With the aim of developing a tool for this estimation, the specific energy distributions in liquid water around the tracks of several HZE particles with energies up to 100 GeV n−1were calculated by performing track structure simulation with the Monte Carlo technique. In the simulation, the targets were assumed to be spherical sites with diameters from 1 nm to 1 μm. An analytical function to reproduce the simulation results was developed in order to predict the distributions of all kinds of heavy ions over a wide energy range. The incorporation of this function into the Particle and Heavy Ion Transport code System (PHITS) enables us to calculate the specific energy distributions in complex radiation fields in a short computational time.