论文标题
由激光场驱动的三局分子中的三重电离和“沮丧”三元电离
Triple ionization and "frustrated" triple ionization in triatomic molecules driven by intense laser fields
论文作者
论文摘要
我们制定了一个三维半古典模型，以在强驱动的线性三局分子中处理三电子逃生动力学，heh $ _ {2}^{+} $。我们的模型包括库仑奇异性。因此，为避免非物理自动化，我们采用两个标准来关闭两个结合电子之间的库仑排斥力，并在一个电子的运动大部分由激光场确定时将其打开。我们研究了三重和“沮丧”三重电离。在后一个过程中，两个电子逸出，而一个电子保持在rydberg状态。我们发现，在“沮丧”三重电离中占上风，就像“沮丧”的双电离中。我们还发现，与h $^{+} $相比，仍然存在于Rydberg状态的电子更可能被附加到He $^{2+} $上。我们的结果表明，在三重和“沮丧”的三重电离电子相关性中是弱的。此外，我们计算动力学能量的总和，以及最终离子片段的角度模式，三重和“沮丧”三元电离。这些模式表明，碎片分子偏离了其初始线性构型。
We formulate a three-dimensional semi-classical model to treat three-electron escape dynamics in a strongly-driven linear triatomic molecule, HeH$_{2}^{+}$. Our model includes the Coulomb singularities. Hence, to avoid unphysical autoionization, we employ two criteria to switch off the Coulomb repulsive force between two bound electrons and switch it on when the motion of one electron is mostly determined by the laser field. We investigate triple and "frustrated" triple ionization. In the latter process two electrons escape while one electron remains bound in a Rydberg state. We find that two pathways prevail in "frustrated" triple ionization, as in "frustrated" double ionization. We also find that the electron that remains in a Rydberg state is more likely to be attached to He$^{2+}$ compared to H$^{+}$. Our results indicate that in triple and "frustrated" triple ionization electronic correlation is weak. Moreover, we compute the sum of the kinetic energies as well as the angular patterns of the final ion fragments in triple and "frustrated" triple ionization. These patterns suggest that the fragmenting molecule deviates from its initial linear configuration.
