Abstract
M-shell X-ray production cross sections for the light rare-earth elements of 68Er, 70Yb and 71Lu have been measured for incident 4He+ ions in the energy range from 0.75 to 6MeV. The measured X-ray production cross sections are compared to the predictions of the First Born approximation, the ECPSSR theory and the ECUSAR theory. A comparison of the ytterbium M-shell X-ray production cross sections with these theories is made for two different sets of fluorescence yields and Coster–Kronig factors that are further modified for multiple ionization.
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