激光场对快速分子离子与固体相互作用的影响

Influence of laser field on interactions between swift molecular ions and solids

利用线性化的流体力学方程和泊松方程 ,描述了在强激光场作用下快速分子离子在固体中产生的电激发过程 ,并推导出分子离子中两个离子之间的动力学相互作用势和相互作用力的一般表达式 .通过数值求解离子的运动方程 。

Using the linearized hydrodynamic-Poisson equations, we describe electronic excitations of electron gas in solids, and derive general expressions for the induced potential in the target, and the interaction force among the ions within a molecule, in the presence of a laser field. Based on the numerical solution of equations of motion for the constituent ions, the Coulomb explosion patterns and the molecular energy losses are studied for a range of laser parameters. It has been found that by increasing the laser intensity, the wake effects in the interaction potential become weaker. This means that the deflection of the molecular axis to the direction of the projectile velocity is not significant, and the energy loss of the molecular ions is also reduced.