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利用Nd:YAG激光器三倍频、输出波长为=355nm的激光光解NO2分子,可产生NO分子,将NO分子通过共振增强多光子电离(REMPIresonanceenhancedmultiphotoionization)及飞行时间(TOFtimeofflight)质谱技术,获得振转态分辨的NO(X2∏,υ″J″)离子谱NOγ(0,0),γ(0,1),γ(1,1)。通过理论计算,可将NO离子带的P、R、Q支线进行标识。NO分子的离子信号强度与UV电离激光能量(λ≈226nm)之间关系能用二次方曲线很好拟合。它表明NO分子是通过(1+1)双光子吸收而电离。这些结果对NO分子的电离动力学提供了有益的信息。
The NO molecule can be produced by photolysis of NO2 molecule with a Nd: YAG laser at a triplet frequency and a laser wavelength of 355nm. The NO molecule is excited by resonance enhanced multiphoton ionization and time of flight (TOFtimeofflight) mass spectrometry NO (0,0), γ (0,1), γ (1,1) for the state-resolved NO (X2Π, υ “J”) ion spectrum. Through theoretical calculation, NO, ion band P, R, Q branch line can be identified. The relationship between the ion signal intensity of the NO molecule and the UV ionization laser energy (λ≈226 nm) can be well fitted by a quadratic curve. It shows that the NO molecule is ionized by (1 + 1) two-photon absorption. These results provide useful information on the ionization kinetics of NO molecules.