Photodetachment of a Homo-Nuclear Linear Tetra-Atomic Negative Molecular Ion
A. Rahman,Iftikhar Ahmad**,A. Afaq,H. J. Zhao
1Department of Physics, Hazara University, Mansehra, Pakistan 2Department of Physics, University of Malakand, Chakdara, Pakistan 3Centre of Excellence in Solid State Physics, University of the Punjab, Quid-e-Azam Campus, Lahore-54590, Pakistan 4School of Physics and Information Science, Shanxi Normal University, Linfen 041004
Photodetachment of a Homo-Nuclear Linear Tetra-Atomic Negative Molecular Ion
A. Rahman,Iftikhar Ahmad**,A. Afaq,H. J. Zhao
1Department of Physics, Hazara University, Mansehra, Pakistan 2Department of Physics, University of Malakand, Chakdara, Pakistan 3Centre of Excellence in Solid State Physics, University of the Punjab, Quid-e-Azam Campus, Lahore-54590, Pakistan 4School of Physics and Information Science, Shanxi Normal University, Linfen 041004
摘要The photodetachment of a homo-nuclear linear tetra-atomic negative molecular ion is studied theoretically for an arbitrary laser polarization. An expression for the total cross section is obtained by using an extended version of the two center model, where each center acts as a source of coherent photodetached-electron waves. Strong oscillations on observation plane, placed at a large distance from the ion, are observed. The amplitude of these oscillations is maximum when the laser polarization is parallel to the molecular axis. Furthermore, the amplitude decreases as the angle between the laser polarization and molecular axis increases and consequently vanishes when they are perpendicular to each other. It is also found that if the distance between the adjacent centers is very small or very large, then the amplitude of oscillations is negligibly small.
Abstract：The photodetachment of a homo-nuclear linear tetra-atomic negative molecular ion is studied theoretically for an arbitrary laser polarization. An expression for the total cross section is obtained by using an extended version of the two center model, where each center acts as a source of coherent photodetached-electron waves. Strong oscillations on observation plane, placed at a large distance from the ion, are observed. The amplitude of these oscillations is maximum when the laser polarization is parallel to the molecular axis. Furthermore, the amplitude decreases as the angle between the laser polarization and molecular axis increases and consequently vanishes when they are perpendicular to each other. It is also found that if the distance between the adjacent centers is very small or very large, then the amplitude of oscillations is negligibly small.
A. Rahman,Iftikhar Ahmad**,A. Afaq,H. J. Zhao. Photodetachment of a Homo-Nuclear Linear Tetra-Atomic Negative Molecular Ion[J]. 中国物理快报, 2012, 29(4): 43301-043301.
A. Rahman,Iftikhar Ahmad**,A. Afaq,H. J. Zhao. Photodetachment of a Homo-Nuclear Linear Tetra-Atomic Negative Molecular Ion. Chin. Phys. Lett., 2012, 29(4): 43301-043301.
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2012, Vol. 29 
