Evaluation of uranium and plutonium internal standards [electronic resource].
Published
Washington, D.C. : United States. Dept. of Energy, 1985. Oak Ridge, Tenn. : Distributed by the Office of Scientific and Technical Information, U.S. Dept. of Energy
Two internal standards have been synthesized and evaluated for application in mass spectrometric analysis of uranium. Each standard is a mixture of highly enriched 233U and 236U. One is used to refine 235U/238U ratio measurements and the other for isotope dilution applications. An internal standard consisting of a mixture of 242Pu and 244Pu has been characterized for use in plutonium analyses. Precisions obtainable on pulse-counting instruments have been improved to about 0.1%. 21 refs., 13 tabs.