详细信息
As_2(X^1∑_g^+)基态的平衡结构与光谱常数
Equilibrium Structure and Spectroscopy Constant for the Ground State X_1∑_g^+ of As_2
文献类型:期刊文献
中文题名:As_2(X^1∑_g^+)基态的平衡结构与光谱常数
英文题名:Equilibrium Structure and Spectroscopy Constant for the Ground State X_1∑_g^+ of As_2
作者:蒋利娟[1];李树红[2]
第一作者:蒋利娟
机构:[1]新乡学院物理与电子工程系;[2]新乡职业技术学院实训处
第一机构:新乡学院物理与电子工程学院
年份:2012
卷号:40
期号:3
起止页码:52-54
中文期刊名:河南师范大学学报:自然科学版
收录:CSTPCD;;北大核心:【北大核心2011】;CSCD:【CSCD_E2011_2012】;
基金:河南省自然科学计划项目(2010C140002);河南省基础与前沿技术研究计划项目(112300410025);新乡学院"理论物理"重点学科建设资助
语种:中文
中文关键词:平衡结构;光谱常数;Murrell-Sorbie函数
外文关键词:equilibrium structure; spectroscopy constant; Murrell-Sorbie function
摘要:运用B3P86,B3LYP,QCISD,QCISD(T),CCSD,CCSD(T)等方法、6-311G,6-311++G(d,p),6-311G(df),6-311++G(3df),6-311+G(3df),aug-cc-pvdz等基组对As2基态的平衡结构进行优化计算.计算结果与实验值进行比较,得出B3LYP/6-311+G(3df)基组为最优基组;然后对As2基态进行谐振频率计算,得到谐振频率cm-1,并进行单点能扫描计算,用最小二乘法拟合为Murrell-Sorbie函数,由势能函数参数计算与As2基态相对应的光谱常数,结果与实验数据较为一致.这些数据为砷团簇研究提供了理论依据.
The equilibrium structure of the ground state X^1∑g^+ of As2 have been calculated using B3P86, B3LYP, QCISD,QCISD(T) ,CCSD,CCSD(T) method and 6--311G,6--311++G(d,p),6--311G(df),6--311++G(3df),6--311+G (3dr) ,aug cc-pvdz basis sets. The conclusion is gained and the method B3LYP/6--311+G(3df) is the most suitable for the en- ergy calculation of As2 by comparing the experimental data. The harmonic frequency and whole potential curve for the ground state of As2 are further scanned using B3LYP/6--311+G(3df) method, then have a least square fitted to Murrell-Sorbie function, and last the spectroscopy constants are calculated, which are in better agreement with the experimental data. It is believed that Murrell-Sorbie function form and B3LYP/6 -- 311 + G(3df) method are suitable for the ground state of As2. These data provide a theoretical basis for Arsenic cluster.
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