文献类型：期刊文献

英文题名：Energy transfer in multi-collision environments; an experimental test of theory: LiH (10;2) in H2(0;0)

作者：Shen, Xiaoyan[1];Wang, Shuyin[1];Dai, Kang[1];Shen, Yifan[2];McCaffery, Anthony J.[3]

机构：[1]East China Univ Sci & Technol, Sch Chem & Mol Engn, Shanghai 200237, Peoples R China;[2]Xinjiang Univ, Sch Phys, Urumqi 830046, Peoples R China;[3]Univ Sussex, Dept Chem, Brighton BN16SJ, E Sussex, England

年份：2017

卷号：146

期号：11

外文期刊名：JOURNAL OF CHEMICAL PHYSICS

收录：;EI(收录号：20171303503302);WOS:【SCI-EXPANDED(收录号:WOS:000397313600019)】；

基金：The experimental component of this study was partially supported by the National Natural Science Foundation of China (No. 11164028 and 11364042). The authors wish to thank a referee for very helpful suggestions that have markedly improved the original manuscript.

语种：英文

外文关键词：Computation theory - Energy transfer - Relaxation processes - Excited states

摘要：We report separate experimental and theoretical studies of the equilibration of highly excited LiH (v = 10; J = 2) in H-2 at 680 K. Experiments that follow the time evolution of state-to-state population transfer in multi-collision conditions with mu s resolution were carried out by Shen and co-workers at Xinjiang University and East China Institute of Science and Technology. At the same time, theoretical computations on the relaxation of this gas mixture were undertaken by McCaffery and co-workers at Sussex University. Rapid, near-resonant, vibration-vibration energy exchange is a marked feature of the initial relaxation process. However, at later stages of ensemble evolution, slower vibration-rotation transfer forms the dominant relaxation mechanism. The physics of the decay process are complex and, as demonstrated experimentally here, a single exponential expression is unlikely to capture the form of this decay with any accuracy. When these separate studies were complete, the evolution of modal temperatures from the Sussex calculations was compared with experimental measurements of these same quantities from Shanghai and Urumqi. The two sets of data were marked by their near identity, within experimental and computational error, representing an experimental validation of the theoretical/computational model developed by the Sussex group and a significant experimental advancement by the group of Shen et al. Published by AIP Publishing.