6. Choice of backscatter loss corrections:
0 … No Backscatter (used for Packwood and Bastin original)
1 … Backscatter of Duncumb-Reed (FRAME-I)
2 … Backscatter of Duncumb-Reed (COR-II) and Heinrich
4 … Backscatter of Duncumb-Reed (COR-II) and Heinrich
5 … Backscatter of Love-Scott
6 … Backscatter of Myklebust-I
7 … Backscatter of Myklebust and Fiori (not implemented)
8 … Backscatter of Pouchou and Pichoir
9 … Backscatter of August, Razka and Wernisch
10 … Backscatter of Springer
11 … Backscatter of Donovan (Duncumb-Reed Mod.)
The conventional correction is #1. Corrections #1 and #4 give similar results. The default correction is #4. A new option is #11 which is the standard Duncumb/Reed correction with a modified backscatter loss calculation based on modified electron fractions as opposed to mass fractions. See Donovan and Westphal (2000). This modification is using a Z^0.85 power scaling to compensate for nuclear screening effects. This modified calculation works especially well when the standard and unknown are very different in average Z.