用代数-能量自洽法研究双原子分子解析势能函数

来源 :第五届全国计算原子与分子物理学术会议 | 被引量 : 0次 | 上传用户:javajnihook
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研究简介在孙卫国课题组提出的计算双原子分子完全振动能谱及离解能的代数方法(AlgebraicMethod,AM)和研究双原子分子解析势能函数的能量自洽法(Energy Consistent Method,ECM)基础上,建立了计算双原子分子体系精确解析势能函数的代数-能量自洽法(AM—ECM).AM—ECM 方法从体系精确的实验振动数据出发,利用标准的AM 方法获得正确收敛于体系离解极限的完全振动能谱,再将这组完全振动数据作为ECM 方法的收敛判据,并通过改变唯一变分参量λ 来最终确定双原子分子解析势能函数.应用AM—ECM方法研究了HCl - X1∑+和Na2-43∑g+等2 个电子态的解析势能表达形式,并与其他方法的研究结果进行了比较,获得了能正确描述这些电子态在渐近区和离解区的精确解析表达结果.研究结果表明,AM—ECM 势能够准确地描述双原子分子电子态的全程势能行为.同时该方法在分子渐进区和离解区获得的精确势能,为双原子分子化学结构以及化学反应碰撞等研究领域提供了重要的研究数据.
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研究简介使用我们新建立的研究双原子分子转动能级和振转相互作用能的转动代数方法(AMr),挖掘获得了隐藏在双原子分子实验振转能级子集合[EυJ] 中的分子纯转动能级{εJ }和
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