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K-edge energy

E_K est. = 49.03 keV

EK≈13.6(Z−1)21000×43 keVE_K\approx\frac{13.6(Z-1)^2}{1000}\times\frac{4}{3}\ \mathrm{keV}

K-edge ≈ 1.17 × Moseley Kα. Iodine 33.2 keV, barium 37.4, gadolinium 50.2, tungsten 69.5.

Laser