A smeared edge (Ebisawa PhD thesis, implemented by Frank Marshall).
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1 E < Ec |
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where:
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par1= Ec |
the threshold energy (keV) |
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par2= f |
the maximum absorption factor at threshold |
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par3= a |
index for photo-electric cross-section (normally –2.67) |
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par4= W |
smearing width (keV) |
![exp[-f(E/E_c)^alpha]*[1-exp((E_c-E)/W)] E >= E_c](XSmodelSmedge_files/image002.gif){kind=small}