Inner-shell multiple ionization of polyatomic molecules with an intense x-ray free-electron laser studied by coincident ion momentum imaging
Inner-shell multiple ionization of polyatomic molecules with an intense x-ray free-electron laser studied by coincident ion momentum imaging
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DOI：
10.1088/0953-4075/46/16/164031
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发表时间：
2013-08-28
影响因子：
1.6
通讯作者：
Rudenko, A.
中科院分区：
文献类型：
--
作者：
Erk, B.;Rolles, D.;Rudenko, A.
用准离子动量谱法研究了两种含硒烃分子甲基硒醇（CH3SeH）和乙基硒醇（C2H5SeH）在光子能量分别为1.7 keV和2kev的5 fs强x射线脉冲(bbb10 （17) W cm(-2)）下的电离和断裂。通过测量电荷态和离子动能，我们发现了分子环境中电荷再分配的特征。此外，通过分析片段离子角相关性，我们可以确定单个分子的实验室框架方向，从而研究分子框架中的碎片动力学。这可以区分来自不同分子位置的质子，以及确定导致它们发射的反应通道。
The ionization and fragmentation of two selenium containing hydrocarbon molecules, methylselenol (CH3SeH) and ethylselenol (C2H5SeH), by intense (>10(17) W cm(-2)) 5 fs x-ray pulses with photon energies of 1.7 and 2 keV has been studied by means of coincident ion momentum spectroscopy. Measuring charge states and ion kinetic energies, we find signatures of charge redistribution within the molecular environment. Furthermore, by analyzing fragment ion angular correlations, we can determine the laboratory-frame orientation of individual molecules and thus investigate the fragmentation dynamics in the molecular frame. This allows distinguishing protons originating from different molecular sites along with identifying the reaction channels that lead to their emission.