  We report gamma ray spectroscopy measurements of trinitite samples and
analogous samples obtained from detonation sites in Nevada and Semipalatinsk,
as well as in situ measurements of topsoil at the Trinity site. We also report
the first isotopic composition measurements of trinitite using the novel
forensics technique of decay energy spectroscopy (DES) as a complement to
traditional forensics techniques. Our measurements are compared to other
published results.
