从上能级向两边下能级辐射的自发辐射谱中产生了三个超窄谱线，且在很大参数范围内光谱具有这一特性。
There are three ultra narrow spectral lines in the spontaneous emission spectra from upper level to lower lying levels of the two emission channels, which occur over a wide range of the parameters.
基于实验跃迁谱线，19个观测能级得以确立，其中有14个能级此前未见报道。
Based on these transition lines 19 energy levels have been determined and 14 energy levels are new ones.
在可见光范围给出了所观察到的各条谱线的发射截面及相应上能级的激发截面。
The emission cross sections of the observed lines and the excitation cross sections of the corresponding states are obtained in the visible region.
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