Nonsequential double ionization of the aligned hydrogen molecule in strong field

Abstract

This paper studies the nonsequential double ionization (NSDI) process of diatomic molecules aligned parallel and perpendicular to an intense linearly polarized laser field by using a three-dimensional semiclassical model. With this model, it achieves insight into the ion momentum distribution under the combined influence of a two-centre Coulomb potential and an intense laser field, and this result shows the significant influence of molecular alignment on the ratio between double and single ionization rate. Careful investigations show that the NSDI process for different alignment molecules has a close relation to the laser intensity and the different bounding electron distribution has a significant influence on the final ion momentum distribution.

H2: the benchmark molecule for ultrafast science and technologies

“…Modeling the combined electron-nuclear dynamics in H 2 with quantum [87][88][89] and classical models [90] allowed a detailed analysis of the NSDI mechanisms such as multiple recollisions, and recollision induced excitation. Furthermore, theory specifically addressed NSDI in few-cycle optical pulses [91,92], the alignment dependence of NSDI [93][94][95] and its wavelength dependence [96].…”

Finite Element Analysis for the Crack Self-Repairing Behavior of the Concrete Beam Embedded Shape Memory Alloy

“…The smart structures with SMA have been extensively studied by scholars [4][5][6][7][8][9][10]. The results indicated that SMA makes good repair effect on structure deformation.…”

“…The control effect of the bundle of SMA to concrete beam bridge deformation has been analyzed [8]. Analysis of the repairing mechanism and influencing factors of the excessive deformation and cracks of SMA concrete continuous beam is carried out [9]. Both the active control experimental study and the nonlinear finite element numerical analysis to the deformation and crack of the SMA concrete beam are done [10].…”

Equivalent Mechanical Properties of Graphene Predicted by an Improved Molecular Structural Mechanics Model

“…Li and Chou adopted the AMBER force field parameters [3] to compute Young's modulus and Poisson ratio of carbon nanotubes (CNTs). By using the concept of flexible connection for framed structures [4] , Yan and Shi [5] and Zhao and Shi [6] proposed the flexibly connected frame models for the analysis of CNTs and graphene respectively. The rotational stiffness of the flexible connection in these flexibly connected frame models was determined by the energy equivalence of the angle variation between tow C-C bonds.…”