高空间分辨率微剂量学与ΔE-E探测器在C-12光束:蒙特卡罗模拟

2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC) Pub Date : 2013-10-01 DOI:10.1109/NSSMIC.2013.6829010

L. Tran, D. Bolst, S. Guatelli, D. Prokopovich, Y. C. Keat, M. Petasecca, M. Lerch, M. Reinhard, A. Fazzi, E. Sagia, S. Agosteo, N. Matsufuji, A. Rosenfeld

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摘要

利用Geant4蒙特卡罗工具研究了ΔE-E望远镜在不同深度、0.5mm步进的布拉格峰内特定位置C12离子束的响应。假设平均弦长为1.8 μm，得到ΔE阶段响应的微剂量谱，并模拟了相同点的散点图。结果表明，微剂量学光谱在BP附近和BP远端0.5 mm深度增量内发生显著变化，这是用TEPC无法观察到的。对每个位置的微剂量谱和YD贡献的碎片(He4, He3, Li7, Be9, B11)和中子进行了分析。

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High spatial resolution microdosimetry with ΔE-E detector on C-12 beam: Monte Carlo simulations

The response of ΔE-E telescope in C¹² ion beam at defined positions within the Bragg peak at different depths with 0.5mm step was studied using Geant4 Monte Carlo toolkit. The microdosimetric spectra derived from ΔE stage response using assumption that average chord is 1.8 μm along with simulated scatter plots for the same points. It was demonstrated that microdosimetric spectra is changing dramatically within 0.5 mm depth increments close to and at distal part of the BP that is impossible to observe with TEPC. Fragments (He⁴, He³, Li⁷, Be⁹, B¹¹) and neutrons contributed to microdosimetric spectra and to YD have been analyzed for each position.

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2013 IEEE Nuclear Science Symposium and Medical Imaging Conference (2013 NSS/MIC)

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