Céolin D, Travnikova O, Bao Z, Piancastelli M N, Tanaka T, Hoshino M, Kato H, Tanaka H, Harries J R, Tamenori Y, Prümper C, Lischke T, Liu X-J, Ueda K
Department of Synchrotron Radiation Research, Institute of Physics, University of Lund, P.O. Box 118, SE-221 00 Lund, Sweden.
J Chem Phys. 2008 Jan 14;128(2):024306. doi: 10.1063/1.2812926.
A photochemistry study on nitrous oxide making use of site-selective excitation of terminal nitrogen, central nitrogen, and oxygen 1s-->3pi excitations is presented. The resonant Auger decay which takes place following excitation can lead to dissociation of the N2O+ ion. To elucidate the nuclear dynamics, energy-resolved Auger electrons were detected in coincidence with the ionic dissociation products, and a strong dependence of the fragmentation pathways on the core-hole site was observed in the binding energy region of the first satellite states. A description based on the molecular orbitals as well as the correlation between the thermodynamical thresholds of ion formation and the first electronic states of N2O+ has been used to qualitatively explain the observed fragmentation patterns.
本文介绍了一项利用端基氮、中心氮和氧的 1s→3π 激发进行的一氧化二氮光化学研究。激发后发生的共振俄歇衰变可导致 N2O+ 离子解离。为阐明核动力学，在与离子解离产物符合探测中检测了能量分辨的俄歇电子，并在第一卫星态的结合能区域观察到碎裂途径对芯孔位置有强烈依赖性。基于分子轨道以及离子形成的热力学阈值与 N2O+ 的第一电子态之间的相关性的描述已被用于定性解释观察到的碎裂模式。
