298～330nm范围SF_2自由基(2+1)REMPI光谱研究

The (2+1) REMPI Spectra of SF_2 Radical between 298 and 330 nm

1990年Hudgens等人在文献［1］中报道了SF2自由基4P里德堡态（3＋1）REMPI光谱中存在不正常的振动间隔，迄今这一现象尚未研究清楚．我们从实验中获得了298～330nm范围的SF2自由基4p里德堡态（2＋1）REMPI光谱．通过对光谱数据的分析，我们试探性地将这段光谱归属于SF2自由基从基态分别到二个不同电子激发态的共振跃迁．标识结果表明，这种归属能较好地解释4P里德堡态不正常的振动间隔的现象．并得到了相应的分子常数．

Hudgens reported a abnormal vibration interval in 3+1 REMPI spectrum of 4p Rydberg state of SF2 radical in 1990. The origin of it has not been found since then. The (2+1) REMPI spectrum of the 4p Rydberg state of the SF2 between 298 and 330 urn is reported in this paper. We tried assigning this spectrum to two species of transitions from the ground state to two electronic excited states and found it may shed some light on the essence of the abnormal interval.