Computation and error analysis of the optical constants of gold in the 280 to 640 eV range from transmission diffraction data

In this paper, we present optical constants of gold (the real and imaginary parts of the complex index of refraction n ̂=(1-δ)+ik) omputed from transmission diffraction data taken with gold gratings at SSRL in February and March of 1981. Our error analysis implies maximum uncertainties of about ±8% for δ and about ±20% for k over the entire 280 to 640 eV range. Strong discrepancies between our and previously published values of δ are indicated, and a previously unreported minimum is observed in k in the vicinity of 600 eV. © 1983.