超短脉冲激光对溴甲烷的光解机理研究  

Investigation of photo-dissociation mechanism of methyl bromide with ultra short laser pulses

作　　者：张瑾[1] 马建国[1] 

机构地区：[1]淮南师范学院物理与电子信息系,安徽淮南232001

出　　处：《合肥工业大学学报（自然科学版）》2012年第6期848-852,共5页Journal of Hefei University of Technology：Natural Science

基　　金：安徽省自然科学基金资助项目(11040606M128);安徽省高等学校省级自然科学基金资助项目(KJ2009B271Z;KJ2008A146);淮南市科技局重点资助项目(2010A03021)

摘　　要：文章通过共振增强多光子电离飞行时间质谱和质量选择光电离激发谱,对溴甲烷分子的光电离和光解离通道进行了研究,并对部分碎片离子H+、CHm+(m=0～3)、iBr+(i=79,81)和CHmiBr+(m=2;i=79,81)的分质量激发谱进行了归属和标识;对CH3+的共振峰进行了确认;最后分析并给出了在279～287nm紫外光波段内,溴甲烷分子以母体分子的解离通道为主的解离通道。Experimental investigation was carried out on the photo-ionization and photo-dissociation channels of methyl bromide by using resonance enhanced multiphoton ionization time-of-flight mass spectrometer and mass-selected excitation spectra. Then the mass signals were assigned to H^＋ , CH^＋ （m=0-3）, iBr＋ （i= 79, 81） and CHm^＋ i^Br^＋ （m=2; i=79, 81）. Two resonant features of CH3^＋ were also determined Finally, in the ultraviolet range of 279--287 nm, the dissociation channels of methyl bromide molecule, mainly showing as those of parent molecule, were given and analyzed

关 键 词：溴甲烷 共振增强多光子电离 飞行时间质谱 通道 

分 类 号：O561[理学—原子与分子物理]