项目名称: 基于含时密度泛函理论的激光调控下的重粒子碰撞过程的理论研究
项目编号: No.11504316
项目类型: 青年科学基金项目
立项/批准年度: 2016
项目学科: 数理科学和化学
项目作者: 张春丽
作者单位: 许昌学院
项目金额: 20万元
中文摘要: 重粒子碰撞过程在实验室及天体等离子体环境中扮演着重要角色,能够影响等离子体电离平衡和能量输运过程。其中的电荷转移,也称电荷交换或电荷俘获过程,在托克马克中性束注入、等离子体边界粒子和能量交换,宇宙行星大气、超新星残余、银河系中心和边缘的X射线产生中起着重要的作用。离子与原子分子碰撞的电荷转移过程一直是原子分子物理中一个活跃的研究领域,多体多中心电子关联效应是重粒子碰撞理论研究的难点之一,理论计算的难度很大,特别是对电子关联效应强的中、低能碰撞过程。本项目将采用含时密度泛函理论模拟多电子碰撞体系电荷转移过程,并通过强激光对整个碰撞过程进行调控。本项目完成后得到的重粒子碰撞原子参数,可以应用到天体物理的EUV和软X射线光谱模拟,以及实验室托克马克等离子体电荷转移光谱诊断的研究中,解决相关的物理问题。
中文关键词: 重粒子碰撞;电荷转移;激光场;含时密度泛函理论
英文摘要: Heavy particle collisions play an important role in laboratory and astrophysical plasma environments by affecting the ionization balance and energy transport. The charge transfer and ionization cross sections are necessary physical parameters in the simulations of particle transport and energy transfer in the diverter region of Tokamak, and they are also important in the planetary atmosphere, relic of supernova, X-ray generation of galactic center and edge. The charge transfer process in collisions of ion with neutral gases is an important direction in atomic and molecular physics. The theoretical study on charge transfer is a big challenge because it involves the multibody dynamics and multicenter electron correlations. This project will apply the time-dependent density functional theory to simulate the process of charger transfer in collisions of ion with neutral gases and the modulation of intense laser will been considered during the collision process. The obtained atomic data can be used to simulate the spectrum of EUV and soft X-ray in the astrophysics, and also used in the diagnostics of plasmas in Tokomak.
英文关键词: heavy particle collision;charge transfer;laser field;time dependent density functional theory