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Title:Gases
Authors:ID Kodre, Alojz (Author)
ID Arčon, Iztok (Author)
ID Padežnik Gomilšek, Jana (Author)
Files:URL http://dx.doi.org/10.1107/S1574870722003202
 
URL https://it.iucr.org/Ia/
 
Language:English
Work type:Unknown
Typology:1.26 - Scientific Entry in Dictionary, Encyclopaedia or Lexicon
Organization:UNG - University of Nova Gorica
Abstract:X-ray absorption spectroscopy of gases is seldom used for structural analysis, except in as much as the extended X-ray absorption fine-structure (EXAFS) signal is used to monitor some specific molecular process. Gas spectroscopy, however, has been the main tool in the systematic study of higher-order photoabsorption processes, multielectron photoexcitations (MEEs), which were introduced with an experiment at the K edge of argon. Along with noble gases, where MEEs are studied in the pure form, free of the structural signal, measurements have been extended to monatomic metal vapours, although at the cost of considerable experimental difficulties. Several types of absorption cells have been devised, among them the ceramic double cell and the heat-pipe cell for experiments in the low-energy region. In a high-temperature oven with considerable technical refinement, edge profiles of nonvolatile metals were measured up to 2500 K. Edge profiles and MEEs, which are strongly dependent on electron correlation, provide sensitive tests of the theory of atomic and molecular structure.
Keywords:X-ray absorption spectroscopy, absorption cells, gas and vapour samples, multielectron photoexcitation, effects of electron correlation
Publication status:Published
Publication version:Version of Record
Year of publishing:2024
Number of pages:Str. 404-408
COBISS.SI-ID:206379267 New window
ISBN:9781119433941
UDC:54
DOI:10.1107/S1574870722003202 New window
NUK URN:URN:SI:UNG:REP:VKPXUTSS
Publication date in RUNG:05.09.2024
Views:352
Downloads:2
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Record is a part of a monograph

Title:International tables for crystallography : X-ray absorption spectroscopy and related techniques
Editors:C. T. Chantler
Place of publishing:Bognor Regis
Publisher:Wiley
Year of publishing:2020
ISBN:978-1-119-43394-1
COBISS.SI-ID:89610755 New window
Collection title:International tables for crystallography
Collection ISSN:1574-8707

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