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Photoelectric Cross‐Sections: Comparison Between Experimental and Renormalized and Unrenormalized Theoretical Values
Author(s) -
Kerur B. R.,
Thontadarya S. R.,
Hanumaiah B.
Publication year - 1997
Publication title -
x‐ray spectrometry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.447
H-Index - 45
eISSN - 1097-4539
pISSN - 0049-8246
DOI - 10.1002/(sici)1097-4539(199701)26:1<45::aid-xrs184>3.0.co;2-#
Subject(s) - photoelectric effect , range (aeronautics) , physics , attenuation , photon , atomic physics , cross section (physics) , absorption (acoustics) , nuclear physics , optics , materials science , quantum mechanics , composite material
X‐ray attenuation coefficients, μ m , determined for four elements and eight compounds at 6.400 and 8.041 keV were used to obtain the total photon cross‐section for elements in the range 13⩽ Z ⩽30 and for Z =42 and 73. These were compared with the ‘present best’ values produced by Creagh and Hubbell (ITVC values). Except for those elements whose absorption edges are in the range ‐1 keV<Δ E <+2 keV (Δ E = E x ‐ E ν ), all the other elements had μ m values in close agreement with the ITVC values. The fractional error in the experimental values were found to be less than 2%. The derived photoelectric cross‐sections were compared with Scofield’s renormalized and unrenormalized theoretical values. The experimental results were found to be consistently higher than the renormalized theoretical values by about 2–3%. © 1997 by John Wiley & Sons, Ltd.