NOTE: The symbols used here are slightly different from Chantler [16], in order to clearly differentiate the mass attenuation coefficients from the atomic crosssections and the linear absorption coefficients, but the meanings are identical.
Z  Atomic number  
E  Energy in keV  
λ  Equivalent wavelength using E. 

Atomic weight  g/mol, used in determination of conversion factors  
ρ  Nominal density in typical elemental material for determination of linear absorption coefficients µ = [µ/ρ]ρ  
Atomic photoabsorption crosssection in barns/atom  
Edge energies  Values taken from ref. [76]  
Edge labels  Spectroscopic notation (K = 1s, L_{I} = 2s, L_{II} = 2p_{1/2}, et seq.)  
f_{1}, f_{2}  Atomic form factors in eu (electrons/atom) for forward scattering following (eq 4) and (eq 7).  
f_{rel}  Relativistic correction to Re(f), following ref. [6] (denoted H82), and refs. [2225], scaled as in refs. [16,17], [60] (denoted 3/5CL)  
f_{NT}  Nuclear Thomson correction to Re(f) following (eq 4) and ref. [10,11]  
f_{2}, Kshell  Component of f_{2} relating to the isolated Kshell orbital  
[µ/ρ]_{PE} = σ_{PE}/uA  Mass photoelectric attenuation coefficient (cm^{2}/g)  
[µ/ρ]_{PE,K}  Component of [µ/ρ]_{PE} relating to the isolated Kshell orbital (cm^{2}/g)  
σ/ρ (coh+inc)  Estimate of coherent and incoherent (σ_{coh} + σ_{incoh}) scattering crosssection sum (cm^{2}/g)  
[µ/ρ]_{tot} = σ_{tot}/uA  Mass attenuation coefficient (cm^{2}/g) (eq 8)  
Full lines on plots  Current theoretical tabulation for f_{1}, f_{2}  
+  Earlier theoretical implementation [16] showing limited convergence near selected edges  
Thick dashes  Henke et al., experimental synthesis (ref. [32,33])  
Dotted curves with crosses  Theoretical results for comparison reinterpolated from ref. [28,29], [34], for f_{2} and [µ/ρ]  
Circles with error bars  Experimental results, summarized in ref. [34] 