Determination of the Distribution of Uranium and the Transuranic Elements in the Environment by Thermal Ionization Mass Spectrometry

摘要

Recent applications of these techniques at the Savannah River Laboratory and other laboratories include: measurements that show that about 3t of sup 237 Np was produced in atmospheric tests of nuclear weapons; certification measurements of the Pu content of a marine sediment standard for the International Atomic Energy Agency, identification at Los Alamos National Laboratory of the source of a human Pu exposure; and a study of the Pu isotopic distribution in the North Atlantic Ocean. The last study showed that Pu in deep ocean sediments contained a mixture of Pu from surface based testing at the Nevada Test Site and from the earlier atmospheric weapon tests. (ERA citation 12:029289)