Imaging Isocyanic Acid Photodissociation at 193 nm:the NH(a^1△)+CO(X^1∑^+)Channel

作     者：张志国 辛敏 赵书涛 陈旸 

作者机构：阜阳师范学院物理与电子工程学院阜阳236041 中国科学技术大学化学物理系、合肥微尺度物质科学国家研究中心合肥230026 

出 版 物：《Chinese Journal of Chemical Physics》 (化学物理学报（英文）)

年 卷 期：2018年第31卷第1期

页      面：27-32,I0001页

核心收录：

学科分类：081704[工学-应用化学] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

基　　金：supported by the National Natural Science Foundation of China(No.21573227,N0.11604052) the National Science Foundation of Anhui Province of China(No.1608085QA19) the Natural Science Research Project of Education Department of Anhui Province of China(No.2014KJ020) the Open Foundation of State Key Laboratory(No.SKLMRDK201503,No.SKLMRD-K201611,and No.SKLMRDK201711) the Doctoral Foundation of Fuyang Normal University(No.FSB201501005) 

主　　题：Isocyanic acid Photodissociation dynamics Sliced velocity map ion imaging 

摘      要：The photodissociation dynamics of isocyanic acid （HNCO） has been studied by the time- sliced velocity map ion imaging technique at 193 nm. The NH（a1△） products were measured via （2＋1） resonance enhanced multiphoton ionization. Images have been accumulated for the NH（a1△） rotational states in the ground and vibrational excited state （v=0 and 1）. The center-of-mass translational energy distribution derived from the NH（a1△） images implies that the CO vibrational distributions are inverted for most of the measured 1NH（v｜j） internal states. The anisotropic product angular distribution observed indicates a rapid dissociation process for the N-C bond cleavage. A bimodal rotational state distribution of CO（v） has been observed, this result implies that isocyanic acid dissociates in the S1 state in two different pathways.