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利用激光光解NO2 分子 ,通过共振增强多光子电离 (REMPIresonanceenhancedmultiphotoionization)及飞行时间 (TOFtimeofflight)质谱技术 ,获得了振转态分辨的NO(X2 Π ,υ″,J″)与自旋 轨道分辨的氧原子O(2P3PJ″ =2 ,1,0 )离子谱 NO分子与O原子的离子信号强度与UV电离激光能量之间的关系分别能用二次方和三次方曲线很好拟合 ,它表明 :光解产物NO分子和氧原子是分别通过 (1+1)和 (2 +1)多光子吸收过程而被电离的 由氧离子信号得到的氧原子基态三个自旋 轨道支能级布居比f1与f0 分别为 0 .5 4± 0 .0 9和 0 .2 0± 0 .0 4 ,这一比值与统计分布计算的值为 0 .6和 0 .2一致
NO2 molecules were obtained by laser photolysis, and the NO (X2 Π, υ “, J”) and spin-orbit resolved oxygen species were obtained by resonance enhanced multiphoton ionization and time of flight mass spectrometry. Atomic O (2P3PJ "= 2, 1,0) Ion spectra The relationship between the ion signal intensities of the NO and O atoms and the UV ionizing laser energy, respectively, can be fitted well by the quadratic and cubic curves, The NO and oxygen atoms of the photolysis products are the three spin-orbital energy levels of oxygen atoms derived from oxygen ion signals that are ionized by the (1 + 1) and (2 +1) multiphoton absorption processes, respectively f1 and f0 were 0.54 ± 0 .0 9 and 0 .2 ± 0 .0 4, respectively. This ratio was consistent with the statistical distribution of 0.6 and 0.2