Dissociation of multiply ionized carbonyl sulfide due to electron impact
Dissociation of multiply ionized carbonyl sulfide due to electron impact
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DOI：
10.1063/1.1554738
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发表时间：
2003-03
影响因子：
4.4
通讯作者：
Pengqian Wang;C. Vidal
中科院分区：
文献类型：
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作者：
Pengqian Wang;C. Vidal
通过电子碰撞电离，在200 eV的电子能量下，研究了单电离到三电离的硫化羰的解离。使用二维和三维协方差映射技术，伴随着聚焦飞行时间质谱仪。得到了三重电离的硫化羰（OCS）的各种解离通道的绝对截面。不稳定的OCS二价态主要解离成离子对，而OCS三价态解离成离子三重态或离子对的几率相当。单电离总截面与双星相遇Bethe方法的结果一致。在协方差图上观察到对应于OCS 2 +→CO++S+的亚稳态衰变迹线。
The dissociation of singly to triply ionized carbonyl sulfide has been studied through electron impact ionization at an electron energy of 200 eV. Two- and three-dimensional covariance mapping techniques are used, accompanied by a focusing time-of-flight mass spectrometer. The absolute cross sections for the various dissociation channels of up to triply ionized carbonyl sulfide (OCS) have been obtained. The unstable OCS dications dissociate mostly into ion pairs, while the OCS trications dissociate into ion triple or ion pair with comparable probabilities. The total single ionization cross section agrees with the result of the binary-encounter-Bethe method. A metastable decay trace corresponding to OCS2+→CO++S+ is observed on the covariance map.