The A←X transition in Cr2: Predissociation, isotope effects, and the 1–1 sequence band
The A←X transition in Cr2: Predissociation, isotope effects, and the 1–1 sequence band
复制标题
Cr2 中的 A←X 跃迁：预解离、同位素效应和 1-1 序列带
DOI：
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发表时间：
1983
期刊：
影响因子：
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通讯作者：
S. Wexler
中科院分区：
文献类型：
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作者：
S. J. Riley;E. K. Parks;L. G. Pobo;S. Wexler
双色共振增强电离光谱与质量分析进行激光汽化和等熵膨胀冷却产生的Cr2的光束。对于459.6 nm附近的A←X 0-0带，观察到一个广泛的转动光谱，发现其强度分布与J有系统的调制。这种调制及其对同位素组成的惊人的强烈依赖性，被解释为A态的两步预解离，并提出了金属系统中同位素富集的潜在重要的新程序。另外的共振特征被发现约1 nm的原始带的红色，并被分配到1-1序列带。
Two‐color resonance‐enhanced ionization spectroscopy with mass analysis is performed on beams of Cr2 produced by laser vaporization and isentropic expansion cooling. For the A←X 0–0 band near 459.6 nm an extensive rotational spectrum is observed and its intensity profile is found to have a systematic modulation with J. This modulation, and its surprisingly strong dependence on isotopic composition, are interpreted in terms of a two‐step predissociation of the A state and suggest a potentially important new procedure for isotope enrichment in metal systems. An additional resonant feature is found ∼1 nm to the red of the origin band and is assigned to the 1–1 sequence band.