Thickness Variations and Lifetimes of Carbon Foils under Nitrogen-ion Bombardment
Thickness Variations and Lifetimes of Carbon Foils under Nitrogen-ion Bombardment
复制标题
氮离子轰击下碳箔的厚度变化和寿命
DOI：
10.1088/0031-8949/13/2/011
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发表时间：
1976
期刊：
影响因子：
2.9
通讯作者：
L. Quaglia
中科院分区：
文献类型：
--
作者：
P. Dumont;A. E. Livingston;Y. Baudinet;G. Weber;L. Quaglia
在不同的实验条件下，研究了碳在碳箔上的沉积和氮离子轰击下碳箔的寿命。碳沉积速率取决于轰击离子的能量和电流密度，也取决于真空条件。当离子能量为0.125-1.5 MeV/原子，电流密度为0.25-13.0 μA/cm2时，在核物理和束箔光谱学中通常使用的条件下，观察到10 μA/cm2箔的面密度增加高达40%。沉积碳的来源似乎是真空系统残余气体中的含碳分子。通过用冷却挡板包围箔片，消除了碳沉积。箔片的寿命（直到破裂的时间）是指在每个原子给定能量的情况下，一定数量的原子轰击箔片所需的时间。
The deposition of carbon upon carbon foils and the lifetimes of foils during bombardment by nitrogen ions have been investigated under various experimental conditions. The rate of carbon deposition depends upon the energy and current density of the bombarding ions, as well as upon the condition of vacuum. For ion energies of 0.125-1.5 MeV/atom and current densities of 0.25-13.0 μA/cm2, increases in areal density of up to 40% for 10 μg/cm2 foils have been observed under conditions typically employed in nuclear physics and beam-foil spectroscopy. The source of the deposited carbon appears to be carbon-containing molecules in the residual gas of the vacuum system. Elimination of carbon deposition has been achieved by surrounding the foil with a cooled baffle. The lifetime of the foil (time until breakage) is found to be, at a given energy per atom, the time required for a constant number of atoms to have bombarded the foil.