Name Units Value Value Difference
Edge energy eV
Monochromator energy eV
Photoelectron energy eV
Wavenumber (k) Å-1

$k = \sqrt{\frac{2 m_e (E - E_0)}{\hbar^2}}$

$E(k) = E_0 + \frac{(\hbar k)^2}{2 m_e}$