Journal Article

FZJ-2023-02243

http://join2-wiki.gsi.de/foswiki/pub/Main/Artwork/join2_logo100x88.png A novel high-current, high-resolution, low-kinetic-energy electron source for inverse photoemission spectroscopy

Ibach, H.FZJ* ; Tautz, F. S.FZJ* ; Bocquet, F. C.FZJ*

2023
American Institute of Physics [Erscheinungsort nicht ermittelbar]

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Please use a persistent id in citations: http://hdl.handle.net/2128/34498  doi:10.1063/5.0138512

Abstract: A high-current electron source for inverse photoemission spectroscopy is described. The source comprises a thermal cathode electron emission system, an electrostatic deflector-monochromator, and a lens system for variable kinetic energy (1.6–20 eV) at the target. When scaled to the energy resolution, the electron current is an order of magnitude higher than that of previously described electron sources developed in the context of electron energy loss spectroscopy. Surprisingly, the experimentally measured energy resolution turned out to be significantly better than calculated by standard programs, which include the electron–electron repulsion in the continuum approximation. The achieved currents are also significantly higher than predicted. We attribute this “inverse Boersch-effect” to a mechanism of velocity selection in the forward direction by binary electron–electron collisions.

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Contributing Institute(s):

1. Quantum Nanoscience (PGI-3)

Research Program(s):

1. 5213 - Quantum Nanoscience (POF4-521) (POF4-521)
2. DFG project 396769409 - Grundlagen der Photoemissionstomographie (396769409)

Appears in the scientific report 2023

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Database coverage:
; ; Clarivate Analytics Master Journal List ; Current Contents - Engineering, Computing and Technology ; Current Contents - Physical, Chemical and Earth Sciences ; Ebsco Academic Search ; Essential Science Indicators ; IF < 5 ; JCR ; National-Konsortium ; PubMed Central ; SCOPUS ; Science Citation Index Expanded ; Web of Science Core Collection

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