K -shell diagram and hypersatellite spectra of 4d transition elements

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Diamant , R , Huotari , S , Hämäläinen , K , Sharon , R , Kao , C C , Honkimäki , V , Buslaps , T & Deutsch , M 2009 , ' K -shell diagram and hypersatellite spectra of 4d transition elements ' Physical Review A (Atomic, Molecular and Optical Physics) , vol. 79 , no. 6 , pp. 062512 . DOI: 10.1103/PhysRevA.79.062512

Title: K -shell diagram and hypersatellite spectra of 4d transition elements
Author: Diamant, R.; Huotari, S.; Hämäläinen, K.; Sharon, R.; Kao, C. C.; Honkimäki, V.; Buslaps, T.; Deutsch, M.
Contributor: University of Helsinki, Department of Physics
University of Helsinki, Accelerator Laboratory (Department of Physics) (-2009)
Date: 2009
Language: eng
Number of pages: 12
Belongs to series: Physical Review A (Atomic, Molecular and Optical Physics)
ISSN: 1050-2947
URI: http://hdl.handle.net/10138/27373
Abstract: The K-shell diagram (K alpha(1,2) and K beta(1,3)) and hypersatellite (HS) (K-h alpha(1,2)) spectra of Y, Zr, Mo, and Pd have been measured with high energy-resolution using photoexcitation by 90 keV synchrotron radiation. Comparison of the measured and ab initio calculated HS spectra demonstrates the importance of quantum electrodynamical (QED) effects for the HS spectra. Phenomenological fits of the measured spectra by Voigt functions yield accurate values for the shift of the HS from the diagram lines, the splitting of the HS lines, and their intensity ratio. Good agreement with theory was found for all quantities except for the intensity ratio, which is dominated by the intermediacy of the coupling of the angular momenta. The observed deviations imply that our current understanding of the variation of the coupling scheme from LS to jj across the periodic table may require some revision.
Subject: 114 Physical sciences
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