Prefactor calculation when there are both P(Q) and S(Q) (Trac #1259) #1333
Description
The models for vesicle and sphere systems ( P(Q) ) with the hard sphere interaction ( S(Q) ) have two volume fraction: phi_PQ and phi_SQ.
phi_PQ is the volume fraction from the form factor.
phi_SQ is the volume fraction from the structure factor.
Based on the testing of the two models, the prefactor of the scattering intensity is currently set up to be proportional to scale*phi_PQ*phi_SQ.
If the scale is set up to one, the prefactor with the absolute intensity should be proportional to phi_PQ only.
It should not be phi_PQ*phi_SQ.
It is suggested to remove phi_SQ from the calculation of the prefactor.