Simulation of secondary electron yields from thin metal foils after fast proton impact.
Simulation of secondary electron yields from thin metal foils after fast proton impact.
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模拟快速质子撞击后薄金属箔的二次电子产额。
DOI：
10.1093/rpd/ncq472
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发表时间：
2011
影响因子：
1
通讯作者：
Dingfelder,M
中科院分区：
文献类型：
--
作者：
Travia,A;Dingfelder,M
微分和总的非弹性截面的快质子和铜之间的相互作用。计算是在非相对论平面波第一玻恩近似和介电理论下进行的。半经验光学振子强度密度函数和一个简单的线动量色散算法被用来构建能量损失函数或Bethe表面的介质。使用这些非弹性横截面的输运模型在蒙特卡罗代码PARTRAC中实现，以模拟来自这种均匀且各向同性的薄铜箔靶的二次电子发射光谱。与实验结果的比较表明，一般协议的冲击能量>50 eV的非相对论值。然而，该模型高估了较低能量下的二次电子产额。
Differential and total inelastic cross sections are derived for the interaction between fast protons and Cu. The calculations are done under the non-relativistic plane-wave first-Born approximation and the dielectric theory. A semi-empirical optical oscillator strength density function and a simple linear-momentum dispersion algorithm are used to construct the energy loss function or Bethe surface of the medium. A transport model using these inelastic cross sections is implemented in the Monte Carlo code PARTRAC to simulate the spectra of secondary electron emissions from this homogeneous and isotropic thin copper foil target. Comparisons with experimental results show general agreement for impact energies >50 eV up to non-relativistic values. The model, however, overestimates the secondary electron yields at lower energies.