Abstract
Al Kα characteristic and non-characteristic X-ray production cross sections in Ne impacting on Al-foils have been investigated for projectile energies 0.4–20 MeV and foil thicknesses 2–400 μg/cm 2. Thin foils were supported on C-substrates. Three effects were found: The Al Kα characteristic X-ray cross section (1) increases with target thickness and (2) increases for a given Al + C foil upon turning the carbon side to the beam. (3) The X-ray spectral contribution from the C-substrate is less intense by a factor 5 than from a lone C-foil of the same thickness. Al(recoil)→Al contributions to the characteristic X-ray are estimated to be 10 2 less intense than Ne→Al contributions.
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