Electron pair emission from a W(001) surface: photon versus electron excitation.
نویسندگان
چکیده
The electron pair emission from a W(001) surface was studied using a coincidence time-of-flight spectrometer. The aim of this study was to compare the pair emission upon electron impact and upon photon absorption. The energy distributions are markedly different for these two experiments. From this we conclude that the photon-stimulated pair emission carries a significant contribution from a double photoemission process, while the process of first creating a photoelectron, which in a subsequent collision leads to pair emission, is of less importance.
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ورودعنوان ژورنال:
- Journal of physics. Condensed matter : an Institute of Physics journal
دوره 21 35 شماره
صفحات -
تاریخ انتشار 2009