New achievements on relaxation dynamics of atoms and molecules photoexcited in the tender x-ray domain at synchrotron SOLEIL
New achievements on relaxation dynamics of atoms and molecules photoexcited in the tender x-ray domain at synchrotron SOLEIL
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DOI：
10.1088/1361-6455/aa52e8
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发表时间：
2017-01
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通讯作者：
M. Piancastelli;R. Guillemin;T. Marchenko;L. Journel;O. Travnikova;T. Marin;G. Goldsztejn;B. C. de Miranda;I. Ismail;M. Simon
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作者：
M. Piancastelli;R. Guillemin;T. Marchenko;L. Journel;O. Travnikova;T. Marin;G. Goldsztejn;B. C. de Miranda;I. Ismail;M. Simon
最近，法国同步加速器Soleil以最先进的光子和电子能量分辨率，对所谓的2到13 keV的“软”x射线域进行了原子和分子研究。我们用光电子能谱、俄歇能谱和电子-离子符合技术研究了大量的新现象。该清单包括光电子动量引起的反冲，飞秒和亚飞秒时间尺度上的超快核运动，双核空穴研究，电子重新捕获效应，奇异的俄歇衰变路径，深边分子骨架光电子角分布研究，以及深核空位的核-空穴局域化/离域现象。我们证明，新获得的扩展光子能量范围不仅允许研究更多具有更深核心边缘的系统，而且打开了关于深核激发和核电离孤立物种的电子和核动力学的全新地平线。
The so-called ‘tender’ x-ray domain, from 2 to 13 keV, has recently become available for atomic and molecular studies at the French synchrotron SOLEIL with state-of-the-art photon and electron energy resolution. We investigated a wealth of new phenomena by means of photoelectron and Auger spectroscopy and electron–ion coincidence techniques. The list includes recoil due to the photoelectron’s momentum, ultrafast nuclear motion on the femto- and sub-femtosecond time scale, double-core-hole studies, electron recapture effects, exotic Auger decay pathways, deep-edge molecular-frame photoelectron angular distribution studies, and core-hole localization/delocalization phenomena for deep-core vacancies. We demonstrate that the newly accessible extended photon energy range does not simply allow studying more systems with deeper core edges, but opens a totally new horizon in what concerns electron and nuclear dynamics of deep-core-excited and core-ionized isolated species.