The equilirium geometries of heteroatomic cluster Li3Al have been optimized with the energy gradient method using the double-zeta plus polarization (DZP) basis set.The vertical excited energies and the oscillator stre...The equilirium geometries of heteroatomic cluster Li3Al have been optimized with the energy gradient method using the double-zeta plus polarization (DZP) basis set.The vertical excited energies and the oscillator strengths have obtained from ab initio configuration interaction method. Transitions to 11B1, 21B1, 51A1 of AlLi3(C(2v)) and 11B2,21A1, 31B2, 31A1 of AlLi3(D3h→C2v) and 31B2, 11B2, 41A1 of B2Li2(C(2v)) and 11B(2u),21B(1u), 31B(3u) of Li2B2(D(2h)) have considerable values of oscillator.展开更多
用ab initio MRSDCI/6-311G(2 df,2 Pd)方法研究了Li_2H分子电子基态的势能面,计算了285个几何构型点的势能值,并采用Simons-Parr-Finlan展开式对这些势能值进行了拟合,得到均方差X^2等于4.64×10^(-6)(hartree^2).Li_2H分子电子基...用ab initio MRSDCI/6-311G(2 df,2 Pd)方法研究了Li_2H分子电子基态的势能面,计算了285个几何构型点的势能值,并采用Simons-Parr-Finlan展开式对这些势能值进行了拟合,得到均方差X^2等于4.64×10^(-6)(hartree^2).Li_2H分子电子基态的平衡几何构型为R_e=0.172nm,<LiHLi=94.10(°).解离出一个 Li(~2S)原子的离解能为25.441×4.1840kJ/mol,解离出一个H(~2S)原子的离解能为58.296×4.1840KJ/mol,反转能垒等于12.043×4.1840kJ/mol.利用该势能函数,采用离散变量表象方法预测了Li_2H分子处于电子基态的振动能级.展开更多
文摘The equilirium geometries of heteroatomic cluster Li3Al have been optimized with the energy gradient method using the double-zeta plus polarization (DZP) basis set.The vertical excited energies and the oscillator strengths have obtained from ab initio configuration interaction method. Transitions to 11B1, 21B1, 51A1 of AlLi3(C(2v)) and 11B2,21A1, 31B2, 31A1 of AlLi3(D3h→C2v) and 31B2, 11B2, 41A1 of B2Li2(C(2v)) and 11B(2u),21B(1u), 31B(3u) of Li2B2(D(2h)) have considerable values of oscillator.