The infrared spectrum of He–HCO+
The infrared spectrum of He–HCO+
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He–HCO+ 的红外光谱
DOI：
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发表时间：
1995
期刊：
影响因子：
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通讯作者：
E. Bieske
中科院分区：
文献类型：
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作者：
S. Nizkorodov;J. Maier;E. Bieske
通过监测HCO+光片电流，在3 μm （C-H拉伸）区域记录了He-HCO +质子结合配合物的振动预解谱。观察到一个旋转分辨的平行带，从自由HCO+的ν1跃迁红移12.4 cm−1。对类硅藻哈密顿量的分析得到：B″=0.2900±0.0002 cm−1,D″=（1.00±0.06）×10−5 cm−1,B ' =0.2898±0.0010 cm−1,ν1=3076.313±0.010 cm−1。观测到ν1旋转能级的局域扰动，并初步归因于由CO拉伸和HCO+弯曲量子以及低频分子间拉伸和弯曲量子组成的组合振动态的相互作用。旋转线宽受到激光带宽的限制，这表明在ν1能级的寿命中，下限约为250 ps。
The vibrational predissociationspectrum of the He–HCO+proton bound complex has been recorded in the 3 μm (C–H stretch) region by monitoring the HCO+ photofragment current. A rotationally resolved, parallel band is observed, red shifted 12.4 cm−1 from the ν1 transition of free HCO+. Analysis in terms of a diatomiclike Hamiltonian yields B″=0.2900±0.0002 cm−1, D″=(1.00±0.06)×10−5 cm−1, B′=0.2898±0.0010 cm−1, and ν1=3076.313±0.010 cm−1. Localized perturbations to ν1 rotational levels are observed and are tentatively ascribed to interactions with combination vibrational states made up of quanta of the CO stretch and HCO+ bend, and those of the low frequency intermolecular stretches and bends. Rotational linewidths are laser bandwidth limited suggesting a lower limit of approximately 250 ps for the lifetime of the ν1 level.