【作者】 于洋；

【导师】 张程华；

【作者基本信息】 辽宁大学 ， 原子与分子物理， 2012， 硕士

【摘要】 散射是近代物理中揭示物理现象的主要手段之一。其中，氢原子（e,2e）反应是散射问题中最简单的一种情况。近年来，随着激光技术和其他相关学科的发展，激光场对（e，2e）过程的重大影响作用日渐显露，因此，激光场中粒子—原子的散射成为了研究氢原子（e，2e）反应的新课题。这种散射过程无论在理论上还是在实践中都具有积极意义，因此发展出一种包括激光场效应在内的散射理论方法是极为重要的。本文主要研究在弱激光场中C⁶⁺离子离化氢原子的三重微分散射截面，选取共面非对称几何条件。通过理论推导分别求出氢原子处于基态和激发态时，在激光场中的三重微分散射截面和无激光场条件下的三重微分散射截面。并用计算机数值模拟画出相应的图像，通过观察比较分析弱激光场的存在对C⁶⁺单离化基H原子的三重微分散射截面的影响。通过对计算结果和图像的观察可以看出:氢原子处于基态时，在激光场比较小时，binary峰略低于无激光场时，峰值的位置略有移动，随着激光场的增大，binary峰的强度增加，超过无激光场时的高度，峰值的移动逐渐变大。recoil峰的强度也逐渐增加，峰值的移动逐渐增加。同时改变入射角度、入射能量、出射能量，都会造成三重微分散射截面的变化；在激发态时，binary峰会分裂成为两个，改变各参量的值，也会对三重微分散射截面造成影响。更多还原

【Abstract】 Scattering is in the modern physics to reveal the physical phenomena. Amongthem, the hydrogen atoms (e,2e) reaction is the most simple scattering problem. Inrecent years, with laser technology and other related discipline development, laserfield to (e,2e) process the major effect of the growing role revealed, therefore, thescattering of atomic particles in the laser field about the hydrogen atom (e,2e)reaction is a new topic. This scattering process whether in theory or in practice has apositive meaning, therefore, developed a including laser field effect, the scatteringtheory method is extremely important.This paper makes a study of the weak laser field in the ions and the hydrogenatoms from the triple differential scattering section, the selection of asymmetricalcoplanar geometric conditions. Through the theory for the hydrogen atoms in theground state respectively and excited states, in laser field of triple-differentialscattering section and no laser field conditions triple-differential scattering section.With computer numerical simulation draw the corresponding image, through theobservation of comparative analysis of the existence of weak laser field of singlefrom the base of the triple H atoms scattering the influence of differential crosssection.From the numerical results of image and observation we can see that hydrogenatoms in the ground state with laser field more hours,‘binary’ peak slightly lowerthan no laser field, the position of the peak slightly move, along with the increase oflaser field, the strength of the ‘binary’ peak increased, more than no laser field ofheight,when the peak of the mobile increasingly large. The strength of the ‘recoil’peak increases gradually, and the peak value of mobile to increase gradually. At thesame time change incidence angles and incident energy, a shoot energy, can createtriple differential-cross section of the scattering changes. In excited states,‘binary’summit splits into two, change the value of the various parameters, also can totriple-differential scattering section the influence.更多还原