共查询到19条相似文献,搜索用时 31 毫秒
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2008年武汉大学加速器联机系统初步建成,200 kV离子注入机至透射电镜束线进行了运行调试,开展了气体离子注入单晶Si、GaAs、Ag纳米晶和超临界反应堆材料(C276和6XN)的原位结构研究。结果表明,样品在注入至一定剂量时发生明显多晶和非晶化,单晶Si出现非晶化的临界剂量在10~(14) cm~(-2)。C276材料经1×10~(15)cm~(-2)的Ar离子辐照后,产生尺寸3-12 nm的位错环,其密度随剂量提高而增大,至5×10~(15)cm~(-2)出现多晶,剂量超过3×10~(16) cm~(-2)出现非晶化。在加速器-电镜联机光路上安装在线RBS靶室对离子束辐照材料进行元素成分和晶格定位测试。靠近电镜端安装50 kV低能离子源,开展核材料中氦泡形成过程的原位观测。对RBS/C装置进行数字化改造,用Labview控制系统运行,目前可进行计算机控制的背散射沟道测试。 相似文献
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用慢正电子束配合多普勒湮没能谱测量技术研究N~+离子注入镍样品产生的缺陷。由未注入的样品得到了正电子在镍中的扩散参数E_0=4.6keV。比较两个样品的S参数随入射正电子能量变化的曲线给出了95keV、6.4×10~(17)/cm~2剂量的N~+注入镍样品所产生的缺陷分布;缺陷由表面一直延伸到190nm,浓度最大的区域在27—110nm。这些都与由Trim程序的Monte Carlo模拟计算的结果很好地符合。 相似文献
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运用卢瑟福背散射(RBS)和二次离子质谱(SIMS)技术相结合测量了SnO_2透明导电膜的密度和膜厚,对于常压CVD法制备的SnO_2薄膜密度约为6.20g/cm~3,接近相应块状材料的密度。采用~(19)F(p,αγ)~(16)O共振核反应技术测量了用于非晶硅太阳能电池电极的大面积掺氟SnO_2(FTO)中氟的含量和深度分布以及50—180keV的~(19)F~+离子注入SnO_2膜中氟离子的射程分布参数。结果表明,FTO膜中氟元素的含量和深度分布并不是均匀的,而是在0.6×10~(20)—6.O×10~(20)/cm~3间波动;50—180keV的~(19)F~+离子注入SnO_2膜中氟离子的平均投影射程(R_P)值与理论计算结果符合得很好,而平均投影射程标准偏差(ΔR_P)值则比理论值偏大。 相似文献
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The principle of magnetron sputtering is introduced andthe balanced and unbalanced magnetrons are compared andthe necessity of unbalanced magnetrons is explained as well. Several recent developments in plasma magnetron sputtering, i.e., unbalanced magnetron sputtering, pulsed magnetron sputtering and ion assisted sputtering, are discussed. The recent developments of unbalanced magnetron systems and their incorporation with ion sources result in an understanding in growingimportance of the magnetron sputtering technology, which makes the technology an applicable deposition process for a variety of important films, such as wear-resistant films and decorative films. 相似文献
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本文报道了27keV Ar~+离子分别轰击Cu元素靶和CuAu合金靶时溅射Cu原子的同位素(~(63)Cu和~(65)Cu)分馏测量结果,发现:(1)对Cu元素靶,同位素分馏δ_f(~(63)Cu,~(65)Cu)=(62±27)‰,而对Cu-Au合金靶,δ_f=(5.9±1.6)‰;(2)δ_f(~(63)Cu,~(65)Cu)随发射角θ的变化对两者靶而言趋势是相似的,但在CuAu合金靶情况下,当θ≤40°时,δ_f((63)Cu,~(65)Cu)为负值。 相似文献
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Yamamura指出:若能量为E的离子束倾斜轰击多晶元素靶,则原子相对溅射率y(θ)=Y(θ)/Y(0°)随离子束入射角θ变化的曲线可表示为含二个参数的经验公式:y(θ)=t~f·exp{g-(t-1)},t=secθ。其中,f和g是待定参数,其值由实验决定。g=f·cosθ_0,θ_0是元素溅射率Y(θ_0)达到最大值时的离子束最佳入射角。 我们导出了离子束的最佳入射角拟合公式(8),并讨论了它的物理意义。因而,含二个参数的Yamamura经验公式(1)变成只含一个参数的原子相对溅射率公式(4)。其中,待定参数f的值由解析公式(21)给出。 相似文献
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Satoshi Ninomiya Chikage Imada Masafumi Nagai Yoshihiko Nakata Takaaki Aoki Jiro Matsuo Nobutsugu Imanishi 《Nuclear instruments & methods in physics research. Section B, Beam interactions with materials and atoms》2005,230(1-4):483-488
Total sputtering yields have been measured for SiO2 and Cu targets bombarded with Si ions at an incident energy between 500 keV and 5.0 MeV using a quartz crystal microbalance technique. In order to measure total yields accurately, we have developed a beam modulation technique to avoid the effect of thermal drift. In the MeV energy range, an ion penetrates through thin SiO2 and Cu targets and is implanted into a quartz crystal. Therefore, the thickness of these layers deposited on quartz crystals was carefully controlled to avoid damage of quartz crystal by incident ions. As a result, total sputtering yields of SiO2 increased with incident Si ion energy, while those of the Cu target decreased. The total yields of the SiO2 target were represented well by a power low of the electronic stopping power. 相似文献
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《核技术(英文版)》1999,10(1):15
The zirconia containing
12wt%Y2O3 thin films deposited by r.f. magnetron sputtering at 25℃
or 400℃, and then bombarded with Ar+ beam at room temperature were
characterized with XRD before and after Ar+ bombardment. It is found that a
series of phases formation and transformation happened, among them the mostimportant event
is that T' phase appeared after Ar+ irradiation andthe content of the T' phase
increased with the increase of Ar+ iondoses from 5×1015 to 6×1016
ions cm-2. 相似文献