【摘要】 在本文中,我们研究了多光子自由-自由跃迁中原子的修饰效应。我们用不同于Joachain et al的方法处理激光场中氢原子基态波函数并给出自由-自由跃迁微分截面。在数值计算的基础上分析了微分截面随光子能量以及随散射角的变化规律,结果表明当激光场较强时,原子的修饰效应很大,特别是在小动量转移区,原子的修饰效应非常显著。我们的结果还表明即使散射电子与激光场交换的净光子数等于零,原子的修饰效应照样很大。进一步分析我们还发现,考虑原子的修饰效应后,微分截面随散射角和光子能量变化而变化所特有的振荡加剧。更多还原

【Abstract】 We studied the dressed effects of atom for multiphoton Free-Free transition in this paper. In our work, atom can exchange any number of photon with a laser field or a free electron, but in the work of Joachain et al only single photon is exchanged. Taking Hyrogen as an example, We finished detailed calculatons and analysed the changes of differential cross section with the energy of photon and with the angle of scattering, which shows that when the laser field is stronger, the dressed effects of atom are significant, and particularly important in the region of small momentum transfers. In contrast to the results of Joachain et al, the dressed effects of atom based on our results are also significant even net number of exchanged photon is zero. We also find that the dressed effects of atom can led iutensification ofoscillation in the cross sections of Free-Free transition with angle or photonenergy.更多还原