Open AccessTHE RESOLUTION OF CRYSTAL MONOCHROMATOR FOR CONTINUOUS X-RAY SPECTRUM
Author(s) -
Lu Kun-Quan,
Chang Long-Cun,
Yaqin Zhao
Publication year - 1983
Publication title -
wuli xuebao
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.199
H-Index - 47
ISSN - 1000-3290
DOI - 10.7498/aps.32.1505
Subject(s) - monochromator , resolution (logic) , crystal (programming language) , optics , x ray , energy (signal processing) , physics , spectrum (functional analysis) , energy spectrum , intensity (physics) , materials science , computer science , quantum mechanics , wavelength , artificial intelligence , programming language
The energy aberration of crystal monochromator in the case of continuous X-ray spectrum, for instance EXAFS, has been discussed. Based on the fact that the intensity of continuous X-ray varies slowly with the energy and can be treated as a constant, we propose a method of calculating average resolution for flat crystal and the Johann and Johansson arrangement. We have also pointed out some inappropriate points in analyses on the reflect geometry of Johann arrangement described in previous publications. It is shown that Johann crystal can provide a better resolution than that commonly believed.