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[29235] Artykuł:

Ray-tracing simulations of spherical Johann diffraction spectrometer for in-beam X-ray experiments

Czasopismo: Nuclear Inst. and Methods in Physics Research A   Tom: 753, Strony: 121-130
ISSN:  0168-9002
Wydawca:  ELSEVIER SCIENCE BV, PO BOX 211, 1000 AE AMSTERDAM, NETHERLANDS
Opublikowano: 2014
 
  Autorzy / Redaktorzy / Twórcy
Imię i nazwisko Wydział Katedra Procent
udziału		 Liczba
punktów
Paweł Jagodziński orcid logoWZiMKKatedra Matematyki i Fizyki*1725.00  
Marek Pajek17.00  
Dariusz Banaś17.00  
Heinrich F. Beyer17.00  
Martino Trassinelli17.00  
Thomas Stöhlker17.00  

Grupa MNiSW:  Publikacja w czasopismach wymienionych w wykazie ministra MNiSzW (część A)
Punkty MNiSW: 25
Klasyfikacja Web of Science: Article

DOI LogoDOI     Web of Science Logo Web of Science     Web of Science LogoYADDA/CEON    
Keywords:

Monte-Carlo simulations  Ray-tracing  X-ray diffraction  Crystal rocking curve  Spherical Johann spectrometer  High-resolution X-ray spectroscopy 


Abstract:

The results of the Monte-Carlo ray-tracing simulations for a Johann-type Bragg spectrometer with spherically curved-crystal designed to detect the X-rays from a fast-moving source are reported. These calculations were performed to optimize the X-ray spectrometer to be used at the gas-target installed at ion storage ring for high-resolution X-ray experiments. In particular, the two-dimensional distributions of detected photons were studied using the Monte-Carlo method both for the stationary and moving X-ray sources, taking into account a detailed description of X-ray source and X-ray diffraction on the crystal as well as a role of the Doppler effect for in-beam experiments. The origin of the asymmetry of observed X-ray profiles was discussed in detail and the procedure to derive a precise (sub-eV) X-ray transition energy for such asymmetric profiles was proposed. The results are important for the investigations of 1s2pP23→1s2sS13 intrashell transition in excited He-like uranium ions in in-beam X-ray experiments.


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