darkhistory.physics.coll_ion_sec_elec_spec

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

Secondary electron spectrum after collisional ionization.

For ‘old’ method, See 0910.4410. For ‘MEDEA’ method, see Kim Y., Rudd M. E., 1994, Phys. Rev. A, 50, 3954 OR Mon. Not. R. Astron. Soc. 422, 420–433 (2012) For ‘new’ method, TBD

Parameters:

in_eng : float

The incoming electron energy.

eng : ndarray

Abscissa of kinetic energies.

species : {‘HI’, ‘HeI’, ‘HeII’}

Species of interest.

method : {‘old’, ‘MEDEA’, ‘new’}

if method == ‘old’, see 0906.1197; if method == ‘MEDEA’, we follow the method used in the MEDEA code; if method == ‘new’, nothing yet

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.