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首页> 外文期刊>The journal of physical chemistry, A. Molecules, spectroscopy, kinetics, environment, & general theory >Electronic Spectrum of AuF: Hyperfine Structure of the [17.7]1 State
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Electronic Spectrum of AuF: Hyperfine Structure of the [17.7]1 State

机译：AuF的电子光谱：[17.7] 1状态的超精细结构

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摘要

The [17.7]1-X1Σ+ (0,0) band of AuF at 566 nm has been studied by laser excitation spectroscopy. The molecule was prepared in a dc electric discharge by flowing a dilute mixture of SF6 in argon through a hollow gold cathode. The rotational structure of the band has been analyzed for the first time, yielding accurate values for the rotational and Ω-type doubling constants of the upper state. Hyperfine splittings arising from both the 197Au and 19F nuclei have been resolved by recording the spectrum at sub-Doppler resolution using the technique of intermodulated fluorescence spectroscopy. The hyperfine structure is dominated by the 197Au magnetic dipole interaction in the [17.7]1 state, with the 197Au magnetic hyperfine constant determined to be h1 ) -543(4) MHz. It is demonstrated that the negative value of this constant implies that the [17.7]1 state has significant 3Δ1 character and that spin-orbit mixing with a 1Π1 state may be providing the transition intensity to the ground electronic state.
机译：已经通过激光激发光谱研究了566 nm处AuF的[17.7]1-X1Σ+（0,0）谱带。通过使SF6的稀混合物在氩气中流过空心金阴极，在直流放电中制备分子。首次对频带的旋转结构进行了分析，得出了上限状态的旋转常数和Ω型倍增常数的准确值。通过使用互调荧光光谱技术以亚多普勒分辨率记录光谱，已解决了由197Au和19F原子核产生的超精细分裂。超精细结构在[17.7] 1状态下以197Au磁偶极子相互作用为主导，其中197Au磁性超精细常数确定为h1）-543（4）MHz。结果表明，该常数的负值表示[17.7] 1状态具有明显的3Δ1特性，并且具有1Π1状态的自旋轨道混合可能会提供向地电子状态的跃迁强度。

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