Activation products with Z and A larger than target material

When modeling activation by 2-3 GeV electrons, FLUKA seems to produce isotopes with A and Z significantly larger than the target
material. For instance, it produces As-74 and As-72 (Z=33) in Cu (Z=29 A=63,65) and Rh-107 (Z=45) - in Nb (Z=41, A=93). Are these
isotopes produced by the interaction of spallation fragments with the target nuclei?

Is there a way to see the reaction channels that produce a particular isotope?

Thanks!

  -George
Received on Tue Dec 18 2012 - 21:23:39 CET