20 Jun
2011
20 Jun
'11
7:45 p.m.
Hi George,
I have a question though. Because electron scattering depends on the velocity of the electron which in turn depends on the acceleration voltage of the microscope. The gaussian parameters need to be corrected using the relativistic electron velocity by multiplying the ai parameters with m/m0 = (1 – v2/c2) ^-1/2 where v is the relativistic electron velocity and c is the velocity of light (for example m/m0 = 1.58707 for a 300keV electron microscope).
Is the factor m/m0 different for each atom type? Ralf