Gamma rays?
What next, death rays? Or machine guns? What does one need that kind of power for?
Remember this?
Jones, R. and Chure, D.J. 1998. The recapitation of a Late Jurassic theropods dinosaur: a successful application of radiological surveying for locating subsurface fossilized bone. Gaia, 15: 103-110.
Made use of a 'modified, shielded gamma ray scintillator' to find a hot (uranium salts) skull that belonged to a previously collected theropod skeleton.