中国物理B ›› 2009, Vol. 18 ›› Issue (5): 1955-1960.doi: 10.1088/1674-1056/18/5/038

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Guiding of 150keV O6+ ions throughnanocapillaries in an uncoated Al2O3 membrane:specialtime dependence of the transmission profile width

肖国青1, 王瑜玉1, 李德慧1, 陈熙萌2, 席发元2, 邱玺玉2, 邵剑雄2, 崔莹2, 孙光智2, 王俊2, 陈益峰2, 刘会平2, 尹永智2, 娄凤君2, 王兴安2, 徐俊奎2, 周春林2   

  1. (1)Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China; (2)School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China
  • 收稿日期:2008-08-16 修回日期:2008-10-21 出版日期:2009-05-20 发布日期:2009-05-20
  • 基金资助:
    Project supported by the National Natural Science Foundation of China (Grant No 10775063).

Guiding of 150keV O6+ ions through nanocapillaries in an uncoated Al2O3 membrane: special time dependence of the transmission profile width

Chen Xi-Meng(陈熙萌)a)†, Xi Fa-Yuan(席发元)a), Qiu Xi-Yu(邱玺玉)a), Shao Jian-Xiong(邵剑雄)a), Xiao Guo-Qing(肖国青)b), Cui Ying(崔莹)a), Sun Guang-Zhi(孙光智)a), Wang Jun(王俊)a), Chen Yi-Feng(陈益峰)a), Liu Hui-Ping(刘会平)a), Yin Yong-Zhi(尹永智)a), Wang Yu-Yu(王瑜玉)b), Li De-Hui(李德慧)b), Lou Feng-Jun(娄凤君)a), Wang Xing-An(王兴安)a), Xu Jun-Kui(徐俊奎)a), and Zhou Chun-Lin(周春林)a)   

  1. a School of Nuclear Science and Technology, Lanzhou University, Lanzhou 730000, China; b Institute of Modern Physics, Chinese Academy of Sciences, Lanzhou 730000, China
  • Received:2008-08-16 Revised:2008-10-21 Online:2009-05-20 Published:2009-05-20
  • Supported by:
    Project supported by the National Natural Science Foundation of China (Grant No 10775063).

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摘要： This paper reports that the transmission of O6+ ions with energy of 150keV through capillaries in an uncoated Al2O3 membrane was measured, and agreements with previously reported results in general angular distribution of the transmitted ions and the transmission fractions as a function of the tilt angle well fitted to Gaussian-like functions were observed. Due to using an uncoated capillary membrane, our Ψ c is larger than that using a gold-coated one with a smaller value of Ep/q, which suggests a larger equilibrium charge Q∞ in our experiment. The observed special width variation with time and a larger width than that using a smaller Ep/q were qualitatively explained by using mean-field classical transport theory based on a classical-trajectory Monte Carlo simulation.

关键词: guiding effect, Al2O3 nanocapillaries, uncoated membrane, transmission profile width

Abstract: This paper reports that the transmission of O$^{6 + }$ ions with energy of 150keV through capillaries in an uncoated Al$_{2}$O$_{3}$ membrane was measured, and agreements with previously reported results in general angular  distribution of the transmitted ions and the transmission fractions as a function of the tilt angle well fitted to Gaussian-like functions were observed. Due to using an uncoated capillary membrane, our $\psi _{\rm c} $ is  larger than that using a gold-coated one with a smaller value of $\frac{E_{\rm p}}{q}$, which suggests a larger equilibrium charge $Q_\infty $ in our experiment. The observed special width variation with time and a larger  width than that using a smaller $\frac{E_{\rm p} }{q}$ were qualitatively explained by using mean-field classical transport theory based on a classical-trajectory Monte Carlo simulation. 

Key words: guiding effect, Al2O3 nanocapillaries, uncoated membrane, transmission profile width

中图分类号:  (Thin layers, films, monolayers, membranes)

  • 82.45.Mp
61.46.-w (Structure of nanoscale materials) 71.10.-w (Theories and models of many-electron systems)