Monte Carlo calculation of the ionization chamber response to 60Co beam using PENELOPE.
Monte Carlo calculation of the ionization chamber response to 60Co beam using PENELOPE.
复制标题
使用 PENELOPE 蒙特卡罗计算电离室对 60Co 束的响应。
DOI：
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发表时间：
2006
期刊：
影响因子：
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通讯作者：
M. S. Yeom
中科院分区：
文献类型：
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作者：
C. Yi;S. Hah;M. S. Yeom
电离室响应的计算是制定空气温度一级标准的关键因素之一。利用蒙特卡洛PENELOPE程序模拟了平面平行电离室对60Co单能束流的响应。介绍了两种仿真技术，即均匀交互技术和再入技术。评估了C1（硬弹性事件之间单步平均角偏转）、C2（一步中最大平均分数能量损失）、S（最大步长）和W(cc)（由于硬碰撞而产生的次级电子的较低能量）等输入参数对模拟腔剂量的影响。我们发现，当仔细选择W（cc）和S（max）时，PENELOPE得到的石墨和固体空气室对单能60Co光束的模拟腔响应与PENELOPE截面的期望值在0.2%（一个标准差）以内是一致的。
The calculation of the ionization chamber response is one of key factors to develop a primary standard of air kerma. Using Monte Carlo code PENELOPE, we simulated the cavity response of the plane parallel ionization chamber to the monoenergetic 60Co beam incident normally on a flat surface of the chamber. Two simulation techniques, namely, the uniform interaction technique and the reentrance technique, were introduced. The effect of the input parameters such as C1 (average angular deflection in a single step between hard elastic events), C2 (maximum average fractional energy loss in a step), S(max) (maximum step length) and W(cc) (the lower energy of secondary electrons created as a result of a hard collision) on the simulated cavity dose was evaluated. We found that the simulated cavity response of the graphite and solid air chambers obtained by PENELOPE to the monoenergetic 60Co beam could be consistent with the value expected from the cross-sections of PENELOPE to within 0.2% (one standard deviation) when W(cc) and S(max) were selected carefully.