Photodissociation spectroscopy and dynamics of the N2O−2 anion
Photodissociation spectroscopy and dynamics of the N2O−2 anion
复制标题
N2O−2 阴离子的光解离光谱和动力学
DOI：
10.1063/1.471132
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发表时间：
1996
影响因子：
4.4
通讯作者：
D. Neumark
中科院分区：
文献类型：
--
作者：
D. Osborn;D. J. Leahy;D. Cyr;D. Neumark
使用快离子束平移光谱技术研究了 N2O−2(C2v) 阴离子的光谱和解离动力学。描述了一种新开发的脉冲超音速放电源，用于产生内部冷的 N2O−2。观察到从 580 nm 附近开始的结构化吸收带，并借助从头计算将其分配给 B(2A2)←X(2B2) 跃迁。观察到来自上态的两个解离通道：(1) O−+N2O 和 (2) NO−+NO。在多个激发能量下测量两个通道的平移能量和角度分布。通道 (1) 在 570 nm 处的平移能量分布显示了与 N2O 振动激发相对应的解析结构。先验分布很好地描述了通道 (1) 的平移能量分布，表明该通道是 N2O−2 基电子态解离的结果。相反，通道 (2) 似乎是由代表解离产生的......
The spectroscopy and dissociation dynamics of the N2O−2(C2v) anion have been investigated using the technique of fast ion beam translational spectroscopy. A newly developed pulsed supersonic discharge source is described for the production of internally cold N2O−2. A structured absorption band beginning near 580 nm is observed, and is assigned to the B(2A2)←X(2B2) transition with the aid of ab initio calculations. Two dissociation channels from the upper state are observed: (1) O−+N2O and (2) NO−+NO. Translational energy and angular distributions are measured for both channels at several excitation energies. The translational energy distribution for channel (1) at 570 nm shows resolved structure corresponding to N2O vibrational excitation. The translational energy distributions for channel (1) are reasonably well described by prior distributions, indicating this channel results from dissociation from the N2O−2 ground electronic state. In contrast, channel (2) appears to result from dissociation on a rep...