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. 192

Figure 4.2.1.1 

U. W. Arndta
[Figure 4.2.1.1]
Figure 4.2.1.1

f (χ) curves for Cu K-L3 at a series of different accelerating voltages (in kV). From Green (1963[link]).