Al_2O_3微孔膜对60keV O^+离子的“导向”效应  

Guiding of 60 keV O^+ ions through Al_2O_3 nanocapillaries with two different diameters

作　　者：陈益峰[1,2] 陈熙萌[1] 娄凤君[1] 徐进章[1] 绍剑雄[1] 孙光智[1] 王俊[1] 席发元[1] 尹永智[1] 王兴安[1] 徐俊奎[1] 崔莹[1] 丁宝卫[1] 

机构地区：[1]兰州大学核科学与技术学院,兰州730000 [2]兰州物理研究所真空低温技术与物理国防科技重点实验室,兰州730000

出　　处：《物理学报》2010年第1期222-226,共5页Acta Physica Sinica

基　　金：国家自然科学基金(批准号:10775063)资助的课题~~

摘　　要：在不同入射角度条件下,研究了60keV的O+离子入射孔径分别为50nm和30nm,厚度为10μmAl2O3微孔膜的角分布.实验结果表明离子透射微孔膜时发生了导向效应,随着入射角度的增大,透射于孔径大的微孔膜离子计数下降比较快,透射于孔径小的微孔膜离子计数下降比较缓慢.建立了一个初步的理论模型,对以上现象给出了较好的解释.The transmission of 60 keV O^＋ ions through Al2O3 nanocapillaries at a series of different tilt angles is measured. The capillaries with diameters of 50 nm and 30 nm respectively and 10 μm in length are used. The angular distribution and the transmission yields of transported ions are investigated. Our results indicate both the existence of guiding effect when ions pass through the capillary and a significant dependence on the tilt angle. The results also show that the transmission yield increases as the diameter of capillary decreases, and the theoretical model used in our work explains it well.

关 键 词：微孔膜 孔径 导向效应 入射角 

分 类 号：O562.5[理学—原子与分子物理] TQ028.8[理学—物理]