Spectrometer for momentum‐resolved bremsstrahlung spectroscopy
作者:
Th. Fauster,
F. J. Himpsel,
J. J. Donelon,
A. Marx,
期刊:
Review of Scientific Instruments
(AIP Available online 1983)
卷期:
Volume 54,
issue 1
页码: 68-75
ISSN:0034-6748
年代: 1983
DOI:10.1063/1.1137218
出版商: AIP
数据来源: AIP
摘要:
A spectrometer for momentum‐resolved and polarization‐dependent bremsstrahlung spectroscopy (inverse photoemission) in the vacuum UV range is described and the performance of the apparatus is discussed. A Seya–Namioka monochromator combined with a position‐sensitive channel plate device for parallel detection of a wavelength range of 165 A˚ is used as a photon detector and covers an energy regime from 10 to 40 eV with a resolution of 5 A˚. Due to the polarization‐dependent reflectivity of the gold‐coated gratings, the monchromator is also inherently an analyzer for the polarization of the detected light. A space‐charge‐limited Pierce‐type electron gun comprising a BaO dispenser cathode is used as an electron source with 0.1‐A˚−1momentum resolution. The overall energy resolution of the apparatus is 0.3 eV at 20 eV photon energy. The sensitivity is 1.8×104counts per Coulomb and eV for the unoccupieds,pbands of a polycrystalline gold sample.
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