用激光多步激发技术研究了处于6p1/2电离限以下的6p3/2ns自电离态的光谱。 并利用最新的R矩阵的计算结果, 结合多通道量子亏损理论进行了理论分析。 理论结果与实验光谱相符合。

Using a multi-step laser excitation technique, the excitation spectra of the Ba 6p3/2ns (J=1) autoionizing states below the 6p1/2 limit are studied. The experimental data are compared with the results of an R-matrix calculation combined with multichannel quantum defect theory (MQDT). The agreement between experiment and theory is satisfactory.