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Four-level model of ion－ion laser-induced collisional energy transfer and numerical calculations for Ca+－Sr+ system |
| Chen De-Ying(陈德应)†, Zhang Hong-Ying(张洪英), and Fan Rong-Wei(樊荣伟) |
| National Key Laboratory of Tunable Laser Technology, Institute of Opto-Electronics, Harbin Institute of Technology, Harbin 150001, China |
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Abstract The four-level model of laser-induced collisional energy transfer (LICET) for ion--ion collision system is established based on the time-dependent Schr?dinger equation for the electron dynamics, through which the equations of motion of the probability amplitudes and cross section of the collision system are obtained. Numerical calculations are performed for the Ca$^+$--Sr$^+$ system, with the results showing that the peak of the LICET spectrum appears at a resonant frequency of the transfer laser. The magnitude of the obtained collision cross section is in the order of $10^{-16}$ cm$^2$, and is comparable to that obtained in atomic systems, which indicates the validity of the established four-level model.
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Received: 14 April 2009
Revised: 21 August 2009
Accepted manuscript online:
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PACS:
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34.50.Rk
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(Laser-modified scattering and reactions)
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32.70.Cs
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(Oscillator strengths, lifetimes, transition moments)
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31.15.xg
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(Semiclassical methods)
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| Fund: Project supported by the National
Natural Science Foundation of China (Grant Nos.~10674036 and
10774033) and Program of Excellent Team in Harbin Institute of
Technology, China. |
Cite this article:
Chen De-Ying(陈德应), Zhang Hong-Ying(张洪英), and Fan Rong-Wei(樊荣伟) Four-level model of ion－ion laser-induced collisional energy transfer and numerical calculations for Ca+－Sr+ system 2010 Chin. Phys. B 19 053402
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