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64.6 eV电子碰撞电离氦原子(e, 2e)反应的理论研究

陈展斌 刘丽娟 董晨钟

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64.6 eV电子碰撞电离氦原子(e, 2e)反应的理论研究

陈展斌, 刘丽娟, 董晨钟

A theoretical study on electron impact ionization helium (e, 2e) reactions at 64.6 eV

Chen Zhan-Bin, Liu Li-Juan, Dong Chen-Zhong
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  • 利用BBK理论及其修正模型,计算了入射能64.6 eV、 不同枪角情况下,电子碰撞电离氦原子(e, 2e)反应的三重微分散射截面. 分析了曲线结构,对其内部碰撞机制进行了详细的研究和探讨.结果表明: 在非共面几何条件下,碰撞微分截面上所呈现出来的特征是由多种效应共同作用所决定的, 随着条件的不同而相互转化.且在垂直入射几何条件下,末通道存在着极强的动力学屏蔽.
    The triple differential cross sections for electron impact ionization helium (e, 2e) reactions are calculated by use of the BBK and modified BBK model at different gun angles of incident electron energy 64.6 eV. The structures of the cross sections and the physical natures of these structures are discussed in detail. It is found that for the non-coplanar geometry, cross sections are determined by a variety of effects together and these effects are converted to each other under different conditions. Moreover, strong dynamical screening effect is observed in the final state of the perpendicular plane symmetric geometry.
    • 基金项目: 国家自然科学基金(批准号: 10847007, 10876028, 10964010)、 高等学校博士学科点专项科研基金(批准号: 20070736001)、 兰州重离子加速器国家实验室原子核理论中心基金和西北师范大学科技创新工程 (批准号: NWNU-KJCXGC-03-21)资助的课题.
    • Funds: Project supported by National Natural Science Foundation of China (Grant Nos. 10847007, 10876028 and 10964010), the Specialized Research Fund for the Doctoral Program of Higher Education of China (Grant No. 20070736001), the Foundation of Center of Theoretical Nuclear Physics of National Laboratory of Heavy Ion Accelerator of Lanzhou, and the Foundation of Northwest Normal University, China (Grant No. NWNU-KJCXGC-03-21).
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    Schulz M, Moshammer R, Fischer D, Kollmus H, Madison D H, Jones S, Ullrich J 2003 Nature 422 48

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    Murray A J, Bowring N J, Read F H 2000 J. Phys. B At. Mol. Phys. 33 2859

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    Ren X, Senftleben A, Pfluger T, Dorn A, Colgan J, Pindzola M S, Al-Hagan O, Madison D H, Bray I, Fursa D V, Ullrich J 2010 Phys. Rev. A 82 032712

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    Bray I, Fursa D V, Kadyrov A S, Stelbovics A T 2010 Phys. Rev. A 81 062704

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    Yan S, Ma X, Zhang P, Xu S, Zhang S F, Zhu X L , Feng W T, Liu H P 2011 J. Phys. B At. Mol. Opt. Phys. 44 055202

    [16]

    Ren X, Bray I, Fursa D V, Colgan J, Pindzola M S, Pfluger T, Senftleben A, Xu S, Dom A, Ullrich J 2011 Phys. Rev. A 83 052711

    [17]

    Chen Z B, Yang H, Wu X J, Zhang S M 2011 Acta Phys. Sin. 60 063402 (in Chinese) [陈展斌, 杨欢, 吴兴举, 张穗萌 2011 物理学报 60 063402]

    [18]

    Zhang X, Whelan C T, Walters H R J 1990 J. Phys. B At. Mol. Opt. Phys. 23 L173

    [19]

    Yang H, Xing L L, Zhang S M, Wu X J 2011 Acta Phys. Sin. 60 103402 (in Chinese) [杨欢, 刑玲玲, 张穗萌, 吴兴举 2011 物理学报 60 103402]

  • [1]

    Brauner M, Briggs J S, Klar H 1989 J. Phys. B At. Mol. Phys. 22 2265

    [2]

    Zhang S M 2000 J. Phys. B At. Mol. Phys. 33 3545

    [3]

    Sun S Y, Jia X F, Shi W Q, Li X W 2008 Acta Phys. Sin. 57 3458 (in Chinese) [孙世艳, 贾祥富, 师文强, 李雄伟 2008 物理学报 57 3458]

    [4]

    Rescigno T N, Baertschy M, Isaacs W A, McCurdy C W 1999 Science 286 2474

    [5]

    Bowring N J, Read F H, Murray A J 1999 J. Phys. B At. Mol. Opt. Phys. 32 L57

    [6]

    Murray A J, Read F H 1993 J. Phys. B At. Mol. Opt. Phys. 26 L359

    [7]

    Berakdar J, Briggs J S 1994 Phys. Rev. Lett. 72 3799

    [8]

    Schulz M, Moshammer R, Fischer D, Kollmus H, Madison D H, Jones S, Ullrich J 2003 Nature 422 48

    [9]

    Murray A J, Bowring N J, Read F H 2000 J. Phys. B At. Mol. Phys. 33 2859

    [10]

    Saha H P 2011 J. Phys. B At. Mol. Opt. Phys. 44 065202

    [11]

    Hargreaves L R, Stevenson M A, Lohmann B 2010 J. Phys. B At. Mol. Opt. Phys. 43 205202

    [12]

    Nixon K L, Murray A J, Kaiser C 2010 J. Phys. B At. Mol. Opt. Phys. 43 085202

    [13]

    Ren X, Senftleben A, Pfluger T, Dorn A, Colgan J, Pindzola M S, Al-Hagan O, Madison D H, Bray I, Fursa D V, Ullrich J 2010 Phys. Rev. A 82 032712

    [14]

    Bray I, Fursa D V, Kadyrov A S, Stelbovics A T 2010 Phys. Rev. A 81 062704

    [15]

    Yan S, Ma X, Zhang P, Xu S, Zhang S F, Zhu X L , Feng W T, Liu H P 2011 J. Phys. B At. Mol. Opt. Phys. 44 055202

    [16]

    Ren X, Bray I, Fursa D V, Colgan J, Pindzola M S, Pfluger T, Senftleben A, Xu S, Dom A, Ullrich J 2011 Phys. Rev. A 83 052711

    [17]

    Chen Z B, Yang H, Wu X J, Zhang S M 2011 Acta Phys. Sin. 60 063402 (in Chinese) [陈展斌, 杨欢, 吴兴举, 张穗萌 2011 物理学报 60 063402]

    [18]

    Zhang X, Whelan C T, Walters H R J 1990 J. Phys. B At. Mol. Opt. Phys. 23 L173

    [19]

    Yang H, Xing L L, Zhang S M, Wu X J 2011 Acta Phys. Sin. 60 103402 (in Chinese) [杨欢, 刑玲玲, 张穗萌, 吴兴举 2011 物理学报 60 103402]

计量
  • 文章访问数:  5618
  • PDF下载量:  821
  • 被引次数: 0
出版历程
  • 收稿日期:  2011-06-08
  • 修回日期:  2011-12-26
  • 刊出日期:  2012-07-05

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