Fourier transform spectroscopy of CrO: Rotational analysis of the A5Σ-X5Π (0,0) band near 8000 cm−1
Fourier transform spectroscopy of CrO: Rotational analysis of the A5Σ-X5Π (0,0) band near 8000 cm−1
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DOI：
10.1016/0022-2852(84)90125-5
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发表时间：
1984-04
影响因子：
1.4
通讯作者：
A. Cheung;W. Żyrnicki;A. J. Merer
中科院分区：
文献类型：
--
作者：
A. Cheung;W. Żyrnicki;A. J. Merer
用傅里叶变换光谱法研究了CrO的近红外发射光谱。在6000- 10000 cm− 1区域发现了新的弱电子带，其中最强的带在8000 cm−1附近，被证明是5 π-5Π跃迁的（0，0）带，其中5 Π低态是基态。在这条谱带中已经分配了50个分支，这使得气相中五重电子态的第一个详细表征成为可能。现在已经获得了基态自旋-轨道耦合和Λ-加倍间隔的精确值（这只能在Hockinget al. [Canad.J.Phys.58，516-533（1980）]）。相对分支强度与纯5 π-5Π（a）跃迁的计算值不一致，表明相当大的自旋-轨道污染，使得两个或多个竞争跃迁矩之间存在干涉效应。目前还不知道5 π激发态是5 π +还是5 π −。
The emission spectrum of CrO has been investigated by Fourier transform spectroscopy in the near infrared. New weak electronic bands have been found in the 6000- to 10 000-cm−1region, the strongest of which, near 8000 cm−1, is shown to be the (0,0) band of a5Σ-5Π transition where the5Π lower state is the ground state. Fifty branches have been assigned in this band, which have permitted the first detailed characterizations of quintet electronic states in the gas phase. Accurate values have now been obtained for the spin-orbit coupling and Λ-doubling intervals in the ground state (which could only be estimated in the previous laser-induced fluorescence work in the visible region by Hockinget al.[Canad. J. Phys.58, 516–533 (1980)]). The relative branch intensities are not consistent with those calculated for a pure5Σ-5Π(a) transition, and indicate considerable spin-orbit contamination such that there are interference effects between two or more competing transition moments. It is not known whether the5Σ excited state is5Σ+or5Σ−.