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Effect of the Target Size in the Calculation of the Energy Deposited Using PENELOPE Code

机译:目标大小在使用PENELOPE代码存储的能量计算中的影响

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The specific and linear energy was calculated in target sizes of 10 μm, 5 μm, 1 μm, 60 nm, 40nm and 20 nm by taking into account the contribution of the primary photon beams and the electrons generated by them in LiF: Mg, Ti (TLD-100). The simulations were carried out by the code PENELOPE 2011. Using different histories of primary particles, for each energy beams the mean deposited energy is the same, but to achieve a statistical deviation lower than 1% the value of 108 was fixed. We find that setting the values C1 = 0.1 C2 = 0.1 and Wcc = Wcr = 50 eV the time of simulation decreases around the 25%. The uncertainties (1 SD) in the specific energy increases with energy for all target sizes and decreases with target size, with values from 1.7 to 94% for 20 nm and between 0.1 and 0.8% for 10 μm. As expected, the specific and linear energies decrease with target size but not in a geometrical behavior.
机译:考虑到主光子束的贡献以及它们在LiF中产生的电子:Mg,Ti,以10μm,5μm,1μm,60 nm,40nm和20 nm的目标尺寸计算出比线性和线性能量(TLD-100)。仿真是由代码PENELOPE 2011进行的。使用不同的一次粒子历史记录,对于每个能量束,平均沉积能量相同,但是要使统计偏差小于1%,则将108的值固定为固定值。我们发现,设置值C1 = 0.1 C2 = 0.1且Wcc = Wcr = 50 eV,仿真时间减少了大约25%。对于所有目标尺寸,比能量的不确定性(1 SD)随能量增加而增加,对于目标尺寸,不确定度(1 SD)的值从1.7%降低到94%,而在10μm范围内则从0.1%到0.8%。正如预期的那样,比能量和线性能量会随着目标尺寸的减小而减小,而不是随着几何形状的减小而减小。

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