Hi Matthew,
On Sun, Apr 3, 2016 at 8:13 PM, Matthew Marcus <mamar...@lbl.gov> wrote: > <Rant> > It shouldn't be called 'self-absorption'. That's a misnomer, which seems > to have come from a 1992 > paper (Troger, et. al."Full correction of the self-absorption in > soft-fluorescence extended x-ray-absorption fine structure", PRB 46,3283 > (1992). > The effect was described and analyzed in a 1982 paper, which called it an > "attenuation factor": Goulon, et. al. "On experimental attenuation factors > of the amplitude > of the EXAFS oscillations in absorption, reflectivity and luminescence > measurements", J. Physique 43, 539 (1982). > </Rant> > mam > > Thanks!! I completely agree, though I wasn't aware of the historical precedence for the mistake. Using "over-absorption" is a far better term. In X-ray fluorescence, "self-absorption" actually means the attenuation of fluorescence generated within a sample as it travels out of the sample. For over-absorption in XAFS, the issue is measuring absorption in fluorescence mode when the concentration of the absorbing element is not infinitesimal or when the sample thickness is not infinitesimal. --Matt
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