darkhistory.physics.coll_ion_sec_elec_spec

darkhistory.physics.coll_ion_sec_elec_spec(in_eng, eng, species=None)

Secondary electron spectrum after collisional ionization.

See 0910.4410.

Parameters:

in_engfloat

The incoming electron energy.

engndarray

Abscissa of kinetic energies.

species{‘HI’, ‘HeI’, ‘HeII’}

Species of interest.

Returns:

ndarray

Secondary electron spectrum. Total number of electrons = 2.

Notes

Includes both the freed and initial electrons. Conservation of energy is not enforced, but number of electrons is.