An Auger electron-threshold photoelectron coincidence spectrometer for studies of atomic and molecular dications
An Auger electron-threshold photoelectron coincidence spectrometer for studies of atomic and molecular dications
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用于研究原子和分子指示的俄歇电子阈值光电子符合光谱仪
DOI：
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发表时间：
2000
期刊：
影响因子：
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通讯作者：
K. Ito
中科院分区：
文献类型：
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作者：
Y. Hikosaka;F. Penent;P. Lablanquie;R. Hall;K. Ito
研制了俄歇电子-阈值光电子符合谱仪，用于获取原子和分子双阳离子态的光谱信息。光谱仪由两个静电半球分析器组成。俄歇电子由其中一个具有位置敏感探测器的分析器探测。另一个分析器在4π sr立体角上用穿透电场捕获阈值光电子。信号积累电路基于快-慢符合技术。为了证明这类俄歇电子能谱仪的性能和优点，研究了Kr MNN俄歇跃迁。俄歇电子光谱与每个3D subshell获得符合检测与相应的阈值光电子，从而提供明确的分配的俄歇线的初始芯-空穴状态。在符合俄歇电子谱的总能量分辨率达到80 meV（FWHM），一个值，对应于亚自然线宽的自然宽度的Kr的3d芯-空穴状态是101 meV。
An Auger electron-threshold photoelectron coincidence spectrometer has been developed to obtain spectroscopic information on atomic and molecular dicationic states. The spectrometer consists of two electrostatic hemispherical analysers. Auger electrons are detected by one of the analysers with a position sensitive detector. The other analyser captures threshold photoelectrons over a 4π sr solid angle with a penetrating electric field. The signal-accumulation circuit is based on a fast-slow coincidence technique. In order to demonstrate both the performance and advantages of this type of Auger electron spectrometer, the Kr MNN Auger transitions are investigated. Auger electron spectra associated with each 3d subshell are obtained by coincidence detection with the corresponding threshold photoelectrons, thus providing unambiguously assignments for the initial core-hole states of the Auger lines. The total energy resolution in a coincident Auger electron spectrum reaches 80 meV (FWHM), a value which corresponds to a sub-natural linewidth as the natural width of the Kr 3d core-hole states is 101 meV.