Systematic measurement of lineal energy distributions for proton, He and Si ion beams over a wide energy range using a wall-less tissue equivalent proportional counter.
Systematic measurement of lineal energy distributions for proton, He and Si ion beams over a wide energy range using a wall-less tissue equivalent proportional counter.
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使用无壁组织等效正比计数器系统测量质子、He 和 Si 离子束在宽能量范围内的线性能量分布。
DOI：
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发表时间：
2012
影响因子：
2
通讯作者：
M. Takada
中科院分区：
文献类型：
--
作者：
S. Tsuda;Tatsuhiko Sato;F. Takahashi;D. Satoh;S. Sasaki;Y. Namito;H. Iwase;S. Ban;M. Takada
160 MeV质子、150 MeV/u氦和490 MeV/u硅离子束的线性能量y的频率分布是使用无壁组织等效正比计数器（TEPC）测量的，其位置尺寸为0.72 µm。测量的频率分布的y以及剂量平均值，y（D），同意使用粒子和重离子输运代码系统PHITS的微剂量函数计算的相应数据。在LET低于~10 keV µm（-1）的范围内，y（D）的值会增加，这是因为δ射线的离散能量沉积，而在高于~10 keV µm（-1）的范围内，随着δ射线逃逸能量的增加，y（D）的关系会发生逆转。这些结果表明，在估算与高能重离子相对生物学效应（RBE）有关的电离密度时，应注意y（D）与LET之间的差异。
The frequency distributions of the lineal energy, y, of 160 MeV proton, 150 MeV/u helium, and 490 MeV/u silicon ion beams were measured using a wall-less tissue equivalent proportional counter (TEPC) with a site size of 0.72 µm. The measured frequency distributions of y as well as the dose-mean values, y(D), agree with the corresponding data calculated using the microdosimetric function of the particle and heavy ion transport code system PHITS. The values of y(D) increase in the range of LET below ~10 keV µm(-1) because of discrete energy deposition by delta rays, while the relation is reversed above ~10 keV µm(-1) as the amount of energy escaping via delta rays increases. These results indicate that care should be taken with the difference between y(D) and LET when estimating the ionization density that usually relates to relative biological effectiveness (RBE) of energetic heavy ions.
高能重离子轨迹附近的微剂量测定。
影响因子：
3.4
作者：
Metting,NF;Rossi,HH;Braby,LA;Kliauga,PJ;Howard,J;Zaider,M;Schimmerling,W;Wong,M;Rapkin,M
通讯作者：
Rapkin,M