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激光脉冲对氢负离子在金属面附近光剥离的影响

王姗姗 王德华 唐田田 黄凯云

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激光脉冲对氢负离子在金属面附近光剥离的影响

王姗姗, 王德华, 唐田田, 黄凯云

Influence of laser pulse on the photodetachment of H- ion near a metal surface

Wang Shan-Shan, Wang De-Hua, Tang Tian-Tian, Huang Kai-Yun
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  • 利用闭合轨道理论和金属面附近氢负离子的双脉冲光剥离截面的计算公式,计算了氢负离子在金属面附近激光脉冲作用下的光剥离截面.计算结果表明:如果脉冲宽度远大于闭合轨道的回归周期时,它对光剥离截面的影响很小;当脉冲宽度小于闭合轨道的周期或者可以和闭合轨道的周期相比较时,光剥离截面的振荡幅度大大地减弱.光剥离截面除了与脉冲宽度有关外,还与双脉冲之间的时间延迟、相位差有关.对于某些相位差, 双脉冲光剥离截面的取值增大; 而对于另外一些相位差, 光剥离截面的取值减小.因此,可以利用脉冲激光来控制氢负离子在表面附近光剥离
    Using the closed orbit theory and the formulas of double-pulse laser pulse photodetachment cross section of H- ion near a metal surface, we calculated the laser pulse photodetachment cross section of this system. The results suggest that for the double-pulse laser, if the pulse width is much longer than the particular closed orbit period, the contribution of that closed orbit to the photodetachment cross section is very small. If the pulse width is shorter or can be compared with the particular closed orbit period,the contribution of that closed orbit to the photodetachment cross section is reduced. The cross section depends not only on the pulse width, but also on the time delay and the relative phase of the two pulses. For certain relative phase between the two pulses, the photodetachment cross section is increased; while for other relative phases, the photodetachment cross section is reduced. Therefore, we can use the pulse laser to control the photodetachment process of H- near a metal surface. We hope our results will be helpful for experimental research of photodetachment of negativeion influenced by pulse laser near surfaces.
    • 基金项目: 国家自然科学基金(批准号: 11074104, 10604045)和山东高校科技计划(批准号: J09LA02)资助的课题.
    [1]

    Bryantetal H C 1987 Phys. Rev. Lett. 58 2412

    [2]

    Du M L, Delos J B 1988 Phys. Rev. A 38 1896

    [3]

    Peters A D, Jaffe C, Delos J B 1997 Phys. Rev. A 56 331

    [4]

    Peters A D, Delos J B 1993 Phys. Rev. A 47 3020

    [5]

    Liu Z Y, Wang D H 1997 Phys. Rev. A 55 4605

    [6]

    Du M L 2006 Eur. Phys. J. D 38 533

    [7]

    Yang G C, Zheng Y Z, X X Chi 2006 J. Phys. B 39 1855

    [8]

    Wang D H, Yu Y J 2008 Chin. Phys. B 17 1231

    [9]

    Afaq A, Du M L 2007 J. Phys. B 40 1309

    [10]

    Rui K K, Yang G C 2009 Surf. Sci. 603 632

    [11]

    Zhao H J, Du M L 2009 Phys. Rev. A 79 023408

    [12]

    Yang C B, Du M L 2010 J. Phys. B 43 035002

    [13]

    Noordam L D,Duncan D I, Gallagher T F 1992 Phys. Rev. A 45 4734

    [14]

    Du M L 1995 Phys. Rev. A 52 1143

    [15]

    Wang Q L, Starace A F 1995 Phys. Rev. A 51 1260

    [16]

    Du M L 2003 Commun. Thero. Phys. 39 705

    [17]

    Peng L Y, Wang Q L, Starace A F 2006 Phys. Rev. A 74 023402

    [18]

    Ganesan K, Taylor K T 1996 J. Phys. B 29 1293

    [19]

    Huang K Y,Wang D H 2010 Acta. Phys. Sin. 59 933 (in Chinese)[黄凯云、 王德华 2010 物理学报 59 933]

    [20]

    Huang K Y, Wang D H 2010 Chin. Phys. B 19 063402

  • [1]

    Bryantetal H C 1987 Phys. Rev. Lett. 58 2412

    [2]

    Du M L, Delos J B 1988 Phys. Rev. A 38 1896

    [3]

    Peters A D, Jaffe C, Delos J B 1997 Phys. Rev. A 56 331

    [4]

    Peters A D, Delos J B 1993 Phys. Rev. A 47 3020

    [5]

    Liu Z Y, Wang D H 1997 Phys. Rev. A 55 4605

    [6]

    Du M L 2006 Eur. Phys. J. D 38 533

    [7]

    Yang G C, Zheng Y Z, X X Chi 2006 J. Phys. B 39 1855

    [8]

    Wang D H, Yu Y J 2008 Chin. Phys. B 17 1231

    [9]

    Afaq A, Du M L 2007 J. Phys. B 40 1309

    [10]

    Rui K K, Yang G C 2009 Surf. Sci. 603 632

    [11]

    Zhao H J, Du M L 2009 Phys. Rev. A 79 023408

    [12]

    Yang C B, Du M L 2010 J. Phys. B 43 035002

    [13]

    Noordam L D,Duncan D I, Gallagher T F 1992 Phys. Rev. A 45 4734

    [14]

    Du M L 1995 Phys. Rev. A 52 1143

    [15]

    Wang Q L, Starace A F 1995 Phys. Rev. A 51 1260

    [16]

    Du M L 2003 Commun. Thero. Phys. 39 705

    [17]

    Peng L Y, Wang Q L, Starace A F 2006 Phys. Rev. A 74 023402

    [18]

    Ganesan K, Taylor K T 1996 J. Phys. B 29 1293

    [19]

    Huang K Y,Wang D H 2010 Acta. Phys. Sin. 59 933 (in Chinese)[黄凯云、 王德华 2010 物理学报 59 933]

    [20]

    Huang K Y, Wang D H 2010 Chin. Phys. B 19 063402

计量
  • 文章访问数:  7142
  • PDF下载量:  641
  • 被引次数: 0
出版历程
  • 收稿日期:  2010-06-21
  • 修回日期:  2010-08-19
  • 刊出日期:  2011-05-15

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