里德堡钠原子抗磁谱的模型势计算

Model potential calculations of diamagnetic spectra of Rydberg sodium atoms

用B样条基组展开方法结合模型势计算了里德堡钠原子抗磁谱和相应的振子强度谱.径向和角向均采用高阶B样条基组.计算结果与已有的R-矩阵和多通道量子亏损理论相结合(R-matrix+MQDT)法及其他理论计算结果作了比较,几种理论结果在我们所研究的能区内符合得非常好.本文方法较R-ma-trix+MQDT法简单,易于推广到交叉电磁场中里德堡原子的精确谱的计算中.

The energy spectra and oscillator strength of Rydberg sodium atoms in the uniform magnetic fields have been calculated using basis set method combined with model potential. Both the radial and angular wavefunctions are expanded in terms of B-spline functions. The resultant size of Hamihonian matrix is reduced considerably, which make the calculations can be carried out. The results are in good agreement with other theoretical calculations which use the R-matrix approach combined with quantum defects and other methods. The method presented in this paper can be extended easily to the cases of Rydberg atoms in crossed field problem.