Core-valence double photoionization of the CS2 molecule
Core-valence double photoionization of the CS2 molecule
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DOI：
10.1063/1.3469812
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发表时间：
2010-09-07
影响因子：
4.4
通讯作者：
Feifel, R.
中科院分区：
文献类型：
--
作者：
Andersson, E.;Niskanen, J.;Feifel, R.
用TOF-PEPECO技术结合同步辐射，在光子能量hnu=220、230、240、243和362.7 eV处记录了CS2分子的双光电离光谱。光谱记录在S 2p和C1S的内壳层电离区，反映了价区一个内壳空位和一个空位形成的正态。用MCSCF方法模拟了正则态的能量。与S 2p空位有关的光谱结构良好，并与传统的S 2p和价光电子能谱作了比较详细的解释。在垂直双电离能188.45 eV处观察到最低的内壳层价态，并与(2p(3/2))(-1)(2pi(G))(-1)双空位有关。与C1S空位有关的光谱在310.8 eV处有一条明显的谱线，并在较高的双电离能下伴随着额外的宽谱特征。这条线与(C1s)(-1)(2pi(G))(-1)双空位有关。(C-)2010美国物理研究所。[DOI：10.1063/1.3469812]
Double photoionization spectra of the CS2 molecule have been recorded using the TOF-PEPECO technique in combination with synchrotron radiation at the photon energies h nu=220, 230, 240, 243, and 362.7 eV. The spectra were recorded in the S 2p and C 1s inner-shell ionization regions and reflect dicationic states formed out of one inner-shell vacancy and one vacancy in the valence region. MCSCF calculations were performed to model the energies of the dicationic states. The spectra associated with a S 2p vacancy are well structured and have been interpreted in some detail by comparison to conventional S 2p and valence photoelectron spectra. The lowest inner-shell-valence dicationic state is observed at the vertical double ionization energy 188.45 eV and is associated with a (2p(3/2))(-1)(2 pi(g))(-1) double vacancy. The spectrum connected to the C 1s vacancy shows a distinct line at 310.8 eV, accompanied by additional broad features at higher double ionization energies. This line is associated with a (C 1s)(-1)(2 pi(g))(-1) double vacancy. (C-) 2010 American Institute of Physics. [doi: 10.1063/1.3469812]