Calculate Electron and X-ray Ranges For Sample Compositions

EPMA Probe

Calculate Electron and X-ray Ranges For Sample Compositions

This option will cause the program to calculate both the electron range Kanaya-Okayama incident electron scattering distance radii and effective x-ray transmission for a range of densities and thicknesses based on the actual sample composition at the current sample conditions (keV).

 

The expression:

is used for the Kanaya-Okayama calculation and assumes, for compound specimens, that the average atomic number and average atomic weight are calculated based on the weight fractions of the elements in the specimen.

 

The expression:

 

is used to calculate the effective x-ray transmission, where μ is the mass absorption coefficient, ρ is the density and t is the thickness and assumes, for compound specimens, that the average mass absorption coefficient is calculated based on the weight fractions of the elements in the specimen.