>If one was to setup a instrument to look for depleted uranium what energy levels >would it be setup at. Using a 2" x 2" NaI. Thanks in advance. Depleted uranium (U238) can be identified by the 1 MeV gamma emitted from Pa234m. It can give you an indication of uranium being present, but assay information will came from the other gamma energies. S. A. McElhaney mcelhane@contech.com