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Empirical assignment of absorbing electronic state contributions to OCS photodissociation product state populations from 214 to 248 nm
Chemical Physics ( IF 2.0 ) Pub Date : 2018-12-23 , DOI: 10.1016/j.chemphys.2018.12.005
Colin J. Wallace , Carolyn E. Gunthardt , George C. McBane , Simon W. North

The photodissociation dynamics of OCS near 214 nm for the S(1D2) channel were studied using velocity map ion imaging. Earlier studies at this wavelength were extended with new measurements of vector correlations and reanalysis of the rotational distributions in the υ= 0 and υ= 1 CO products. The results were employed to identify the contributions of the 21A (A) and 11A (B) electronic state absorptions in OCS to the population of each CO final state. The contributions of the 11A (B) state to the CO (υ= 1) population was found to be 2.5 times smaller (fB=0.14±0.04) than previous theoretical estimates, and that to the CO (υ= 0) distribution 1.7 times smaller (fB=0.20±0.04). A similar analysis was applied to experimental rotational distributions from the literature at photolysis wavelengths of 223 nm, 230 nm, and 248 nm.



中文翻译:

吸收电子态对214至248 nm的OCS光解离产物态种群的经验分配

S()的OCS在214 nm附近的光解离动力学1个d2个通道使用速度图离子成像技术进行了研究。通过矢量相关性的新测量以及对υ = 0 υ = 1  CO乘积的旋转分布的重新分析,扩展了该波长下的早期研究。结果用于确定2 1的贡献。一个 (A)和11个一个(B)OCS中电子态对每个CO最终态的吸收。1的贡献1个一个(B)发现CO(υ = 1 )的状态为2.5 倍小(F=0.14±0.04),而不是先前的理论估算值,即到CO(υ = 0)的分布1.7 倍小(F=0.20±0.04)。将类似的分析应用于文献中在223 nm,230 nm和248 nm的光解波长下的实验旋转分布。

更新日期:2018-12-25
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