Our TEM is JEM 2100 with EELS Gatan 963 with GMS3 software. For the quantification we have to feed the collectinn angle and convergence angle values.
You take two diffraction patterns on the GIF camera at short camera length, under the conditions the EELS acquisition has been done at (not touching the condenser set-up!) , one with and one without the entrance aperture you used. Calibrate the diffraction patterns from some known Bragg reflections and convert to angles in mrad. Your semi-angle of convergence is given by the radius of the diffraction discs, your semi-angle of collection by the radius of the shadow of your entrance aperture.
You take two diffraction patterns on the GIF camera at short camera length, under the conditions the EELS acquisition has been done at (not touching the condenser set-up!) , one with and one without the entrance aperture you used. Calibrate the diffraction patterns from some known Bragg reflections and convert to angles in mrad. Your semi-angle of convergence is given by the radius of the diffraction discs, your semi-angle of collection by the radius of the shadow of your entrance aperture.
Hello, may I ask what you did not like in my answer that you voted it down?
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