International
Tables for
Crystallography
Volume C
Mathematical, physical and chemical tables
Edited by E. Prince

International Tables for Crystallography (2006). Vol. C, ch. 4.2, p. 236

Figure 4.2.5.1 

D. C. Creaghb
[Figure 4.2.5.1]
Figure 4.2.5.1

The variation of specular reflectivity with incident photon energy is shown for materials of different atomic number and a constant angle of incidence of 0.2°. (a) Aluminium: note the rapid decrease of reflectivity with energy. (b) Copper: the sudden decrease of reflectivity is due to the modification of the scattering-length density owing to absorption at the K-absorption edge. (c) Platinum: the three discontinuities in the reflectivity curve are due to absorption at the LI-, LII-, and LIII-absorption edges.