One-dimensional mapping of gamma emitting radionuclides in support of forensic examination

The development of two generations of a one-dimensional gamma mapping system is described. These systems use high-Z shielding, linear stage, and a high-purity germanium detector. Application to items of forensic interest is described and results for such items are presented. The presented results show the fission product ( 137 Cs) and activation product ( 60 Co) distributions along one-dimension of an archival item.