报道在高压汞弧灯中首次观测到Hg2准分子在225～235 nm谱区、峰值位于230 nm左右的连续发射谱带。实验研究了此发射带随温度的变化，与理论计算的辐射谱相比较，两者十分相符。可以辨认出230 nm发射带归属于Hg2准分子Gou+→Xog+跃迁。实验还拟合获得Xog+态和Gou+态势能曲线平衡核间距的差值ΔRe＝Re″-Re′＝0.085±0.002 nm。

In this paper, we report the first observation of continuum emission band of 225～235 nm with a maximum Peak at about 230 nm of Hg2 excimer in high-pressure mercury arc lamp. Comparing the computer- simulated emission spectra with the experimental results, we identify that this 230 nm continuum band is ascribed to the transition of GO state to XO state of Hg2 excimer, and give the fitting value of equilibrium internuclear separations difference Re"-Re'=0.085±0.002 nm.