Browsing by Author "Jin, Cheng"

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Analysis of angular dependence of strong-field tunneling ionization for CO(2)
(2009-11-01)
Zhao, Song-Feng
;
Jin, Cheng
;
Le, Anh-Thu
;
Jiang, T. F.
;
Lin, C. D.
We analyzed the discrepancy of the angular dependence of strong-field ionization for CO(2) among the different theoretical calculations and experiments. Using a more accurate ground-state wave function of CO(2) in the asymptotic region, we showed that the accuracy in the earlier tunneling ionization theory of Tong [Phys. Rev. A 66, 033402 (2002)] is much improved. We also concluded that the angular dependence deduced from the experiment of Paviccicacute [Phys. Rev. Lett. 98, 243001 (2007)] appears to be too narrowly distributed.
Analysis of angular dependence of strong-field tunneling ionization for CO2
(2009-11-01)
Zhao, Song-Feng
;
Jin, Cheng
;
Le, Anh-Thu
;
Jiang, T. F.
;
Lin, C. D.
We analyzed the discrepancy of the angular dependence of strong-field ionization for CO2 among the different theoretical calculations and experiments. Using a more accurate ground-state wave function of CO2 in the asymptotic region, we showed that the accuracy in the earlier tunneling ionization theory of Tong [Phys. Rev. A 66, 033402 (2002)] is much improved. We also concluded that the angular dependence deduced from the experiment of Paviccicacute [Phys. Rev. Lett. 98, 243001 (2007)] appears to be too narrowly distributed.
Determination of structure parameters in strong-field tunneling ionization theory of molecules
(2010-03-01)
Zhao, Song-Feng
;
Jin, Cheng
;
Le, Anh-Thu
;
Jiang, T. F.
;
Lin, C. D.
In the strong field molecular tunneling ionization theory of Tong et al. [Phys. Rev. A 66, 033402 (2002)], the ionization rate depends on the asymptotic wave function of the molecular orbital from which the electron is removed. The orbital wave functions obtained from standard quantum chemistry packages in general are not good enough in the asymptotic region. Here we construct a one-electron model potential for several linear molecules using density functional theory. We show that the asymptotic wave function can be improved with an iteration method and after one iteration accurate asymptotic wave functions and structure parameters are determined. With the new parameters we examine the alignment-dependent tunneling ionization probabilities for several molecules and compare with other calculations and with recent measurements, including ionization from inner molecular orbitals.