利用反应显微成像谱仪,研究了50 keV/u Ne8+碰撞CO转移电离反应中生成的CO2+碎裂过程.通过重构分子离子爆炸碎片C+和O+的三维动量,获得了质心系中CO2+碎裂过程中释放的动能(KER).在KER谱中发现了来自亚稳态1∑+,1Π,3Π解离的峰、3∑+态解离的峰和1∑Ⅱ)态解离的峰,同时发现了排斥态3∑-的贡献.在3∑-态解离的分子轴取向分布中,首次观测到CO2+解离的分子轴取向效应.
The fragmentations of CO2+ are studied in transfer ionization processes of 50 keV/u Nes+ impact on CO with reaction microscopes.The 3D momenta of C+ and O+ were measured,and the kinetic energy release (KER) of dissociative(CO2+) was obtained accordingly.The peaks resulted from the metastable states of 1∑+,1Π and 3Π,of 3∑+,and of 1∑+(Ⅱ) are identified in KER spectrum.Meanwhile,the repulsive state of 3∑-was also observed,which forms a broad peak lying between the peaks of 3∑+ and 1∑+(Ⅱ).In the CO2+ dissociations from 3∑-state,the orientation effect of CO molecular axis was observed for the first time.
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