Effect of rescattering potential on the high-energy above-threshold ionization of a model-H atom

Effect of rescattering potential on the high-energy above-threshold ionization of a model-H atom
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再散射势对模型 H 原子高能阈值以上电离的影响

DOI:
10.1007/s12648-016-0892-z
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发表时间:
2017
影响因子:
2
通讯作者:
S-F Zhao
S-F Zhao
中科院分区:
物理与天体物理4区
文献类型:
--
作者:
J-H Chen;G-L Wang;Z-R Zhang;S-F Zhao

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采用改进的强场近似(ISFA)方法,以球壳层势作为再散射势,研究了几个周期激光脉冲作用下H原子(1s态,结合能与H原子相同)的高能量阈上电离.数值求解含时薛定谔方程(TDSE)的结果被视为基准结果。结果表明,在波长为800和1200 nm的激光中,用球壳势计算的高能区能量分布与用Yukawa势和零程势计算的结果相匹配或更好.此外,本文还讨论了在不同的出射角下,再散射势对几率密度的影响。
The high-energy above-threshold ionization of a model-H atom (with 1s state and the same binding energy as H atom) in a few-cycle laser pulse is investigated by using the improved strong-field approximation (ISFA), where the spherical shell potential is used as the rescattering potential. The results obtained from numerically solving time-dependent Schrödinger equation(TDSE) are regarded as the benchmark results. Our results show that the energy distributions in high-energy region obtained from ISFA calculations using the spherical shell potential may either match or be better than those from ISFA using Yukawa potential and zero-range potential in the laser with wavelengths of 800 and 1200 nm. In addition, the influence of the rescattering potential on the density of probability at different ejection angles is also discussed in this paper.
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