NOTE: The symbols used here are slightly different from Chantler [16], in order to clearly differentiate the mass attenuation coefficients from the atomic cross-sections 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 cross-section in barns/atom | ||
Edge energies | Values taken from ref. [76] | |
Edge labels | Spectroscopic notation (K = 1s, LI = 2s, LII = 2p1/2, et seq.) | |
f1, f2 | Atomic form factors in eu (electrons/atom) for forward scattering following (eq 4) and (eq 7). | |
frel | Relativistic correction to Re(f), following ref. [6] (denoted H82), and refs. [22-25], scaled as in refs. [16,17], [60] (denoted 3/5CL) | |
fNT | Nuclear Thomson correction to Re(f) following (eq 4) and ref. [10,11] | |
f2, K-shell | Component of f2 relating to the isolated K-shell orbital | |
[µ/ρ]PE = σPE/uA | Mass photoelectric attenuation coefficient (cm2/g) | |
[µ/ρ]PE,K | Component of [µ/ρ]PE relating to the isolated K-shell orbital (cm2/g) | |
σ/ρ (coh+inc) | Estimate of coherent and incoherent (σcoh + σincoh) scattering cross-section sum (cm2/g) | |
[µ/ρ]tot = σtot/uA | Mass attenuation coefficient (cm2/g) (eq 8) | |
Full lines on plots | Current theoretical tabulation for f1, f2 | |
+ | 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 f2 and [µ/ρ] | |
Circles with error bars | Experimental results, summarized in ref. [34] |