hyperspy.misc.eels.electron_inelastic_mean_free_path module

hyperspy.misc.eels.electron_inelastic_mean_free_path.iMFP_Iakoubovskii(density, electron_energy)

Estimate electron inelastic mean free path from density

Parameters:

  • density (float) – Material density in g/cm**3

  • beam_energy (float) – Electron beam energy in keV

Notes

For details see Equation 9 in reference [*].

Returns:

Inelastic mean free path in nanometers

Return type:

float

hyperspy.misc.eels.electron_inelastic_mean_free_path.iMFP_TPP2M(electron_energy, density, M, N_v, E_g)

Electron inelastic mean free path using TPP-2M

Parameters:

  • electron_energy (float) – Electron beam energy in keV

  • density (float) – Material density in g/cm**3

  • M (float) – Molar mass in g / mol

  • N_v (int) – Number of valence electron

  • E_g (float) – Band gap in eV

Returns:

Inelastic mean free path in nanometers

Return type:

float

Notes

For details see reference [†].

hyperspy.misc.eels.electron_inelastic_mean_free_path.iMFP_angular_correction(density, beam_energy, alpha, beta)

Estimate the effect of limited collection angle on EELS mean free path

Parameters:

  • density (float) – Material density in g/cm**3

  • beam_energy (float) – Electron beam energy in keV

  • alpha (float) – Convergence and collection angles in mrad.

  • beta (float) – Convergence and collection angles in mrad.

Notes

For details see Equation 9 in reference [‡].