中文摘要：

对电子和离子同时采用速度聚焦电场收集的阈值光电子-光离子符合成像谱仪能够有效提高电子的收集效率和能量分辨率.利用该符合成像谱仪,开展了Xe/Ar/Ne惰性混合气体及NO分子的阈值光电子谱、阈值光电子-光离子符合质谱和质量选择的符合光谱等实验研究,精确测量了NO分子的电离势,并且获得了NO＋离子振动态分辨的X1Σ＋,c3Π和B1Π态光谱.还进一步研究了NO＋离子c3Π态的解离动力学,通过拟合碎片N＋离子的符合飞行时间质谱峰形,得到了解离过程中释放的总平动能为0.717eV。

英文摘要：

In a recently built threshold photoelectron-photoion coincidence spectrometer,the photoelectrons and photoions were velocity-focused simultaneously to effectively improve the collection efficiency and the energy resolution.With this spectrometer we measured the threshold photoelectron spectra（TPES） and the mass-selected threshold photoelectronphotoion coincidence mass spectra（TPEPICO-MS） of NO molecules,as well as Xe /Ar /Ne rare gas mixtures.The ionization potential of NO was accurately determined,and the vibrationally resolved TPES spectra of the X1Σ ＋,c3Π and B1 Π states of NO ＋ were obtained.Subsequently,the dissociation dynamics of the c3 Π state of NO ＋ were studied by measuring the TPEPICO-MS and fitting the time-of-flight profile of the N ＋ fragment.The overall kinetic energy released from dissociation was determined to be 0.717 eV.