hyperspy._components.volume_plasmon_drude module

class hyperspy._components.volume_plasmon_drude.VolumePlasmonDrude(intensity=1.0, plasmon_energy=15.0, fwhm=1.5, module='numexpr', compute_gradients=False, **kwargs)

Bases: Expression

Drude volume plasmon energy loss function component, the energy loss function is defined as:

\[f(E) = I_0 \frac{E(\Delta E_p)E_p^2}{(E^2-E_p^2)^2+(E\Delta E_p)^2}\]

Variable

Parameter

\(I_0\)

intensity

\(E_p\)

plasmon_energy

\(\Delta E_p\)

fwhm
Parameters:

  • intensity (float) –

  • plasmon_energy (float) –

  • fwhm (float) –

  • **kwargs – Extra keyword arguments are passed to the Expression component.

Notes

Refer to Egerton, R. F., Electron Energy-Loss Spectroscopy in the Electron Microscope, 2nd edition, Plenum Press 1996, pp. 154-158 for details, including original equations.