After transfer, the effective inelastic cross section is dramatically smoother, and so it may be calculated with a limited number of FFD points.
Hence, accepting a very small error, we may define effective elastic and inelastic cross sections according to these two terms.
At this point it should be stressed that the above elements present also important inelastic cross section. Although a possible requirement of isotope separation would be very expensive and even nonfeasible in many cases, only for the sake of research purposes the examined screening materials are assumed to be composed of the selected isotopes in 100% isotopic abundance.
To investigate this possibility various tests were made for elements with notable inelastic cross section at lower energies, i.e., below ~1 MeV.