SciPy

darkhistory.physics.coll_ion_xsec

darkhistory.physics.coll_ion_xsec(eng, species=None)

e-e collisional ionization cross section in cm2.

See 0906.1197.

Parameters:
eng : float or ndarray

Abscissa of kinetic energies.

species : {‘HI’, ‘HeI’, ‘HeII’}

Species of interest.

Returns:
float or ndarray

e-e collisional ionization cross section.

Notes

Returns the Arnaud and Rothenflug rate.

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