ON THE RELATIONSHIP BETWEEN TOTAL ELECTRON PHOTOYIELD AND X-RAY-ABSORPTION COEFFICIENT

We have tested the hypotheses that the total electron photoyield and X -ray absorption coefficient are simply related and that the drain curr ent method can then be reliably used to derive absorption coefficients . By comparing gold photocurrent measurements taken at the Daresbury S ynchrotron Radiation Source (SRS) with experimentally derived linear a bsorption coefficients in the same energy band, we find that the expec ted relationship is accurate over the range 2200-3500 eV to a precisio n of a few percent.