原子与分子物理学报Issue(4)：589-594,6.DOI:10.3969/j.issn.1000-0364.2014.04.014
K（5P）与H2的反应碰撞和电子-振动能量转移
Reaction andelectronic-vibrational energy transfer between K(5 P)and H2
摘要
Abstract
The rotational distribution of KH(v″=0-3)produced in the reaction of K(5P)with H2 has been studied.The resulting rotational states fit roughly a statistical distribution at the system tempera-ture,while the vibrational populations are characterized by a Boltzmann vibrational temperature of 1604K.These results provide evidence that the reaction follows a collinear collisional geometry.Using transient absorption techniques distributions of nascent KH rotational populations in the ground (v″=0) state and vibrationally excited (v″=1,2,3)are determined.The rate coefficients of reaction are (3.45 ±0.86)×10-13,(1.35±0.34)×10-13,(6.28±1.57)×10-14and (2.35±0.59)×10-14cm3s-1 for v″=0, 1,2 and 3,respectively.The electronic-to-vibrational energy transfer between K(5P)and H2 has also been investigated.We have used the CARS (Coherent Anti-stokes Raman Scattering)spectral technique to probe the internal state distribution of collisionally-populated H2 molecules.The scanned CARS spec-tra reveal that during E-V energy transfer processes H2 molecules are produced at the v=1 ,2 and 3 vi-brational levels.From the scanned CARS spectral peaks the H2(0,1),(1,1),(2,1),(3,1)and (3, 3)population ratios are obtained.The population in H2 (0,1)is determined from rotational distribution at 450K for v=1. The populations of (1,1),(2,1),(3,1)and (3,3)are obtained.The rate coeffi-cients for K(5P)-H2(1,1),(2,1),(3,1)and (3,3)are (1.1±0.3)×10-13,(9.3±2.5)×10-14,(4.2 ±1.1)×10-14 and (3.8±1.0)×10-14 cm3 s-1 ,respectively.关键词
反应机制/电子-振动能量转移/高分辨率瞬时吸收/玻尔兹曼分布/K(5P)+H2Key words
Reaction mechanism/Electronic-vibrational energy transfer/High-resolution transient ab-sorption/Boltzmann distribution/K(5P)-H2分类
数理科学引用本文复制引用
李佳灵,张文军,封丽,刘静,戴康,沈异凡..K（5P）与H2的反应碰撞和电子-振动能量转移[J].原子与分子物理学报,2014,(4):589-594,6.基金项目
国家科学自然基金(11164028) （11164028）
