Threshold photoelectrons coincidence spectroscopy of doubly-charged ions of nitrogen, carbon monoxide, nitric oxide and oxygen
Threshold photoelectrons coincidence spectroscopy of doubly-charged ions of nitrogen, carbon monoxide, nitric oxide and oxygen
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DOI：
10.1088/0953-4075/27/11/014
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发表时间：
1994-06
期刊：
影响因子：
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通讯作者：
G. Dawber;A. McConkey;L. Avaldi;M. Macdonald;G. King;R. Hall
中科院分区：
文献类型：
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作者：
G. Dawber;A. McConkey;L. Avaldi;M. Macdonald;G. King;R. Hall
在电子-电子符合实验中研究了氮、一氧化碳、一氧化氮和氧的单光子双电离。利用双穿透场技术获得了阈值光电子符合谱(TPEsCO)，其中只探测到动能几乎为零的电子(<；20 meV)。可获得的高灵敏度和能量分辨率使得可以观测到N22+、Co2+、NO2+和O22+的几种状态，基本上是在它们各自的阈值处激发，从而解决了几乎所有存在它们的状态的振动能级。给出了在TPEsCO谱中观察到的特征的精确能量，以及由此得到的分子参数，并讨论了可能的形成机制。
Single photon double ionization of nitrogen (N2), carbon monoxide (CO), nitric oxide (NO) and oxygen (O2) has been studied in an electron-electron coincidence experiment. Threshold photoelectrons coincidence (TPEsCO) spectra have been obtained using a dual penetrating field technique, in which only electrons with nearly zero kinetic energy (<20 meV) are detected. The high sensitivity and energy resolution attainable have allowed observation of several states of N22+, CO2+, NO2+ and O22+, excited essentially at their respective thresholds, resolving vibrational energy levels for nearly all states where they exist. Accurate energies of the features observed in the TPEsCO spectra, and the molecular parameters derived from them, are presented, and the possible mechanisms of formation are discussed.