Department of Chemistry, Tokyo Institute of Technology, Tokyo 152855, Japan and Institute of Material Structural Science, Photon Factory, Tsukuba, Ibaraki 3050801, Japan.
Phys Rev Lett. 2013 Sep 20;111(12):123001. doi: 10.1103/PhysRevLett.111.123001.
Simultaneous core ionization and core excitation have been observed in the C(2)H(2n) (n=1, 2, 3) molecular series using synchrotron radiation and a magnetic bottle time-of-flight electron spectrometer. Rich satellite patterns corresponding to (K(-2)V) core excited states of the K(-1) molecular ions have been identified by detecting in coincidence the photoelectron with the two Auger electrons resulting from the double core hole relaxation. A theoretical model is proposed providing absolute photoionization cross sections and revealing clear signatures of direct (monopolar) and conjugate (dipolar near-edge x-ray absorption fine structure) shakeup lines of comparable magnitude.
利用同步辐射和磁瓶飞行时间电子能谱仪，在 C(2)H(2n) (n=1, 2, 3) 分子系列中观察到了 C(2)H(2n) (n=1, 2, 3) 分子系列中同时的核心离化和核心激发。通过同时检测光电电子和双核心孔弛豫产生的两个俄歇电子，识别出与 K(-1)分子离子的 (K(-2)V) 核心激发态相对应的丰富卫星图案。提出了一个理论模型，提供了绝对光离子化截面，并揭示了直接（单极）和共轭（近边缘 X 射线吸收精细结构偶极子） shakeup 线的清晰特征，其大小相当。
