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

异氰酸分子NH(a^1△)+CO(X^1∑^+)通道在193 nm的离子成像光解动力学研究（英文）

作　　者：张志国[1] 辛敏[1] 赵书涛[1] 陈旸[2] 

机构地区：[1]阜阳师范学院物理与电子工程学院,阜阳236041 [2]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　　处：《Chinese Journal of Chemical Physics》2018年第1期27-32,I0001,共7页化学物理学报（英文）

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)

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.

关 键 词：Isocyanic acid Photodissociation dynamics Sliced velocity map ion imaging 

分 类 号：O644.1[理学—物理化学]