质子撞击后箔片和生物材料的电子发射
Electron Emission from Foils and Biological Materials after Proton Impact.
作者信息
Dingfelder Michael, Travia Anderson, McLawhorn Robert A, Shinpaugh Jefferson L, Toburen Larry H
机构信息
Department of Physics, East Carolina University, Howell Science Complex, Greenville, NC 27858, USA.
出版信息
Radiat Phys Chem Oxf Engl 1993. 2008;77(10-12):1213-1217. doi: 10.1016/j.radphyschem.2008.05.046.
Abstract
Electron emission spectra from thin metal foils with thin layers of water frozen on them (amorphous solid water) after fast proton impact have been measured and have been simulated in liquid water using the event-by-event track structure code PARTRAC. The electron transport model of PARTRAC has been extended to simulate electron transport down to 1 eV by including low-energy phonon, vibrational and electronic excitations as measured by Michaud et al. (Radiat. Res. 159, 3-22, 2003) for amorphous ice. Simulated liquid water yields follow in general the amorphous solid water measurements at higher energies, but overestimate them significantly at energies below 50 eV.
摘要
测量了快速质子撞击后表面冻结有薄层水（非晶态固体水）的薄金属箔的电子发射光谱，并使用逐事件径迹结构代码PARTRAC在液态水中进行了模拟。PARTRAC的电子传输模型已得到扩展，通过纳入低能声子、振动和电子激发来模拟低至1 eV的电子传输，这些激发是由米肖等人（《辐射研究》159卷，3 - 22页，2003年）针对非晶态冰所测量的。模拟的液态水产额在较高能量下总体上遵循非晶态固体水的测量结果，但在能量低于50 eV时显著高估了它们。
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