Strong-field nonsequential double ionization of Ar and Ne
Strong-field nonsequential double ionization of Ar and Ne
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DOI：
10.1103/physreva.84.023414
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发表时间：
2011-08
影响因子：
2.9
通讯作者：
Zhangjin Chen;Yaqiu Liang;D. Madison;C. Lin
中科院分区：
文献类型：
--
作者：
Zhangjin Chen;Yaqiu Liang;D. Madison;C. Lin
基于定量重散射理论（QRS）研究了Ar和Ne的非顺序双电离（NSDI）。根据QRS理论，每个初等NSDI过程可以通过将返回的电子波包与适当的微分电子-离子散射截面相乘来计算。我们采用（e, 2e）和Ar{sup +}的电子冲击激发截面，得到了Ar在短周期脉冲下NSDI的相关电子动量谱，以检验NSDI对载流子包络相位的依赖性。结果与Johnson等人最近实验的离子动量谱进行了比较。中国生物工程学报，2011,31(2):481 - 481。还对另一强度的Ar进行了计算，以说明NSDI的强度依赖性，并与Feuerstein等人的早期数据进行了比较。Rev. Lett. 87, 043003(2001)]和Ne来说明目标依赖性。我们还在NSDI光谱中讨论了电子-离子碰撞中共振捕获过程的存在。
We investigate the nonsequential double ionization (NSDI) of Ar and Ne based on quantitative rescattering theory (QRS). According to QRS theory, each elementary NSDI process can be calculated by multiplying the returning electron wave packet with appropriate differential electron-ion scattering cross sections. We include (e, 2e) and electron-impact excitation cross sections of Ar{sup +} to obtain the correlated electron momentum spectra for the NSDI of Ar by few-cycle pulses to check the dependence of NSDI on the carrier-envelope phase. The results are compared to the ion momentum spectra from the recent experiment of Johnson et al. [Phys. Rev. A 83, 013412 (2011)]. Calculations have also been performed for Ar at another intensity to illustrate the intensity dependence of NSDI and to compare with the earlier data of Feuerstein et al. [Phys. Rev. Lett. 87, 043003 (2001)] and for Ne to illustrate the target dependence. We also address the presence of resonant capture processes in electron-ion collisions in the NSDI spectra.