Spectroscopy of Negative Molecular Ions (Physics)

负分子离子光谱（物理）

• 批准号: 8719090
• 负责人: John Farley
• 金额: $ 15.61万
• 依托单位: University of Nevada Las Vegas
• 依托单位国家: 美国
• 项目类别: Continuing Grant
• 财政年份: 1987
• 资助国家: 美国
• 起止时间: 1987-08-15 至 1989-07-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=8719090&HistoricalAwards=false
• 关键词: Spectroscopy; Negative; Molecular; Ions; Physics

Spectroscopic studies of negative molecular ions are proposed using a negative ion beam and a coaxial infrared laser beam from a color center laser. Vibrational-rotational transitions are induced between the internal states of the ion, and the excited ionic state autodetaches producing a fast (keV) neutral which is then detected. It is proposed to measure the vibrational-rotational transition of negative ions with sufficient resolution to observe hyperfine structure, and detect metastable states in the autodetachment continuum. It is also proposed to perform photodetachment studies of atomic anions near threshold, measuring the electron affinity of the atom and testing the range of validity of the Wigner law for the behavior of the cross section near threshold. The results are relevant to spectroscopy, quantum chemistry, and to studies of laboratory and terrestrial plasmas.

负分子离子的光谱研究 提出使用负离子束和同轴红外激光器 从色心激光束。 振转 在离子的内部状态之间引起跃迁， 和激发离子态自动分离产生快速（keV） 中性，然后检测。 建议测量 负离子振转跃迁 足够的分辨率来观察超精细结构，并检测 自动分离连续体中的亚稳态。 也是 建议对附近的原子阴离子进行光剥离研究 阈值，测量原子的电子亲和力， 测试维格纳定律对行为的有效性范围 在阈值附近的横截面上。 这些结果与 光谱学、量子化学以及实验室和 地球等离子体