pub fn hydrogenic_k_oscillator_strength_density_per_ev(
binding_energy_ev: f64,
energy_ev: f64,
) -> f64Expand description
The hydrogenic K-shell optical oscillator-strength density per electron,
df/dW in eV⁻¹, at energy loss energy_ev for a shell of binding energy
binding_energy_ev (module docs, “The formula used”). Zero below the
edge; at the edge, its limit (2⁷/(3B)) e⁻⁴.