Module bragg 

Bragg additivity for compounds and mixtures.

W. H. Bragg and R. Kleeman, Phil. Mag. 10, 318 (1905): the stopping cross section of a compound is the atom-fraction-weighted sum of the element cross sections,

S_compound (per average atom) = Σ_j x_j S_j,

so -dE/dx = N Σ_j x_j S_j · f, with N the total atom density and f a per-compound correction factor (CompoundCorrection; default 1) as a hook for chemical/phase corrections (e.g. cores-and-bonds) supplied by the caller from a cited source.

Structs

ConstantCorrection

An energy-independent constant factor.

NoCorrection

No correction: factor exactly 1.

Traits

CompoundCorrection

Per-compound correction factor applied to the Bragg sum.

Functions

bragg_cross_section_per_atom

Stopping cross section per average atom of material, J m² (f · Σ_j x_j S_j).

bragg_stopping_power

Linear stopping power -dE/dx, J/m: N times bragg_cross_section_per_atom.