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L X-ray production cross-section ratios for protons incident on high-Z atoms: A test of ECPSSR theory and newly recommended vacancy de-excitation parameters

Jones, BN and Campbell, JL (2007) L X-ray production cross-section ratios for protons incident on high-Z atoms: A test of ECPSSR theory and newly recommended vacancy de-excitation parameters Nuclear Instruments and Methods in Physics Research Section B: Beam Interactions with Materials and Atoms, 258, 2. 299 - 307 - 299 - 307.

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Abstract

The X-ray intensity ratios L[beta]/L[alpha] and L[gamma]/L[alpha] for six heavy elements have been measured using a Si(Li) detector coupled to both analog and digital signal processors. The proton energies were chosen to ensure that possible united atom (UA) and intra-shell (IS) effects would be small, thereby ensuring that the experiments were a direct test of the ECPSSR together with the L subshell fluorescence and Coster-Kronig probabilities. Careful attention was paid to reducing recognized uncertainties in the fitting of the spectra, with the desired intensity ratios being extracted from a procedure that assumed the DF radiative transition rates of Scofield to be correct. Experiment and ECPSSR theory agree closely when the fluorescence and CK probabilities from a recent critical review are adopted in preference to those commonly used in earlier work. This result provides a significant improvement in the database used for PIXE analysis, and it paves the way for more definitive studies at lower proton energies, aimed at testing predicted UA and IS corrections.

Item Type: Article
Authors :
NameEmailORCID
Jones, BNb.jones@surrey.ac.ukUNSPECIFIED
Campbell, JLUNSPECIFIEDUNSPECIFIED
Date : 2007
Identification Number : 10.1016/j.nimb.2007.01.079
Related URLs :
Depositing User : Symplectic Elements
Date Deposited : 17 May 2017 11:57
Last Modified : 17 May 2017 15:00
URI: http://epubs.surrey.ac.uk/id/eprint/833428

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