含硫小分子离子（SO2+,CS2+）电子激发态研究

y using two ns pulsed laser beams,the excitation and dissociation of small molecular ions with sulfur were studied with state resolution in this project. That is, with the preparing of SO2+ ( (000)) by [3+1] multiphoton ionization of the neutral SO2 molecules at 380.85nm, the photodissociation process and the symmetry of the excited states of SO2+ molecular ions has been investigated by measuring the photofragment SO+ excitation (PHOFEX) spectrum in ultra-violet (UV) (282-332 nm) and in visible (562-664 nm) wavelength range, respectively. The (v100), (0v20) (000) transitions of SO2+ were assigned in the PHOFEX spectrum in the UV range. By comparing the discernable PHOFEX spectrum in UV range with the continuous PHOFEX spectrum in visible range, it is deduced that (i) around SO2+( ) there exists a repulsive state a2A2 converging to the dissociation limit of SO+(X2P)+O(3Pg), (ii) the coupling between SO2+( ) and SO2+(a2A2) leads to the dissociation to SO+(X2P) +O(3Pg), (iii) the symmetry of state is

含硫小分子离子（SO2,CS2等）的知识在气化学、星际空间化学中有重要的学术和实际意义１究翁庠谏淞鞣肿邮跫掠盟傻餍臣す庵票负图し⒄庑┓肿永胱樱懈叻直婕す庥盏加猓↙IF）激发谱和质量分辨光解离激发谱的研究，结量子化学计算，以期获得含硫小分子离子（SO2,CS2等）电子激发态的能级结构及解离动力学信息。