%0 Journal Article
%T The comparison of temporal bond polarizabilities of the nonresonant Raman excited virtual state of ethylene thiourea by two different algorithms<br>亚乙基硫脲分子键伸缩模式与全耦合模式键极化率的对比及其拉曼激发虚态的相关研究
%A Chen Yan-Rong
%A Wang Pei-Jie
%A Fang Yan
%A <br>陈艳荣
%A 王培杰
%A 方炎
%J 物理学报
%D 2010
%I 
%X We studied the temporal bond polarizabilities of ethylene thiourea (ETU) from the Raman intensities by two different algorithms. One algorithm includes only the bond stretching modes and the other includes all bond modes. Our analysis shows that, the algorithm using bond stretching modes, in which only the part of Raman peaks whose vibrational modes have relatively larger proportion in the bond stretching are considered, may have larger errors in certain situations where the stretching and bending modes have significant coupling. Otherwise, this algorithm is just suitable, although it may lose certain physical information. The bond polarizabilities provide much information concerning the electronic distribution of nonresonant Raman excited virtual state. At the initial moment of the 514.5 nm excitation, the tendency of the excited electrons is to spread to the molecular periphery. Meanwhile, the relaxation process of the bond polarizability and the characteristic times for these two models are almost the same.
%K Raman intensity
%K bond polarizability
%K bond stretching mode
%K all bonds coupling mode<br>拉曼峰强
%K 键极化率
%K 键伸缩模式
%K 全耦合模式
%U http://www.alljournals.cn/get_abstract_url.aspx?pcid=6E709DC38FA1D09A4B578DD0906875B5B44D4D294832BB8E&cid=47EA7CFDDEBB28E0&jid=29DF2CB55EF687E7EFA80DFD4B978260&aid=947B4222AB474071ECB58E23D53DD52F&yid=140ECF96957D60B2&vid=6AC2A205FBB0EF23&iid=9CF7A0430CBB2DFD&sid=11E88E37EF3359EC&eid=74B59A69F6A7B96A&journal_id=1000-3290&journal_name=物理学报&referenced_num=0&reference_num=14