Multireference calculations on low-lying states and the X~3 Π_u -~3 Π_g absorption spectra of indium dimers

Multireference configuration interaction calculations are carried out on 11 Λ-S low-lying electronic states of indium dimers. The states are investigated with spin-orbit pseudopotentials via the state-interacting method, and characterized by fitted spectroscopic constants based on computed potential energy curves. The vibrational structures of the double-potential well 0+g (I) ( 3 Σ g ) state are also analyzed. The experimentally observed absorption spectrum centred at ～ 13000cm-1 is simulated and assigned to X 3 Πu (v=0)-3Πg transition according to the present ab initio calculations on transition energies and dipole moment functions.     

La2与LanF（n＝1,2）分子的结构与势能函数

采用密度泛函理论确定La₂与La_n F（n=1,2）分子的电子与结构特性.应用最小二乘法拟合出La₂和LaF分子的Murrell-Sorbie势能函数,在此基础上推导出光谱数据和力常数.基态La₂F分子具有C_2v对称性的弯曲结构,电子态⁴A₂,结合能为7.89 eV.用多体项展式理论得出La₂ F的解析势能函数,其等值势能图准确再现了La₂ F分子的平衡结构.     

MB分子的势能函数与稳定性的密度泛函研究

本文在B3LYP/LANL2DZ水平上计算了MB(M=Cu,Ag,Au) 分子体系的平衡几何、振动频率和解离能.利用Murrell-Sorbie 函数拟合出了解析势能函数,并计算出光谱参数和力常数.计算结果表明该分子体系是稳定存在的,其中AuB分子具有强较稳定性.