caa a22 4500 469112395 CHVBK 20180323133114.0 cr unu---uuuuu 170328e19920801xx s 000 0 eng 10.1007/BF02040486 doi (NATIONALLICENCE)springer-10.1007/BF02040486 Low-level determination of plutonium by gamma and L X-ray spectroscopy [Elektronische Daten] [H. Nitsche, R. Gatti, Sh. Lee] We have developed an analytical method for detection of239Pu in aqueous samples at concentrations as low as 10−10M. This nuclear counting technique utilizes the uranium L X-rays, which follow the alpha-decay of plutonium. Because L X-rays are specific for the element and not for the individual isotope, the isotopic composition of the plutonium sample must be known. The counting efficiency in the 11-23 keV range is determined from a plutonium standard, and the concentration of the sample is then calculated from the L X-ray count and the isotopic composition. The total L X-ray count is corrected for possible contributions from other radionuclides present as impurities by measuring the low-energy gamma-spectrum for each contaminant to establish specific photon/X-ray ratios. The ratios are important when241Pu and242Pu are measured, because the respective decay chain members produce non-U L X-rays. This new method can replace the use of labor-intensive radiochemical separation techniques and elaborate activation methods for analysis of239Pu in aqueous samples. It is also applicable for assaying plutonium in liquid wastes that pose possible hazards to the environment. Akadémiai Kiadó, 1992 Nitsche H. Lawrence Berkeley Laboratory, University of California, Earth Sciences Division, mail Stop 70A-1150, 94720, Berkeley, CA, (USA) aut Gatti R. Lawrence Berkeley Laboratory, University of California, Earth Sciences Division, mail Stop 70A-1150, 94720, Berkeley, CA, (USA) aut Lee Sh Lawrence Berkeley Laboratory, University of California, Earth Sciences Division, mail Stop 70A-1150, 94720, Berkeley, CA, (USA) aut Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 161/2(1992-08-01), 401-411 0236-5731 161:2<401 1992 161 10967 https://doi.org/10.1007/BF02040486 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/BF02040486 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Nitsche H. Lawrence Berkeley Laboratory, University of California, Earth Sciences Division, mail Stop 70A-1150, 94720, Berkeley, CA, (USA) aut NATIONALLICENCE 700 1- Gatti R. Lawrence Berkeley Laboratory, University of California, Earth Sciences Division, mail Stop 70A-1150, 94720, Berkeley, CA, (USA) aut NATIONALLICENCE 700 1- Lee Sh Lawrence Berkeley Laboratory, University of California, Earth Sciences Division, mail Stop 70A-1150, 94720, Berkeley, CA, (USA) aut NATIONALLICENCE 773 0- Journal of Radioanalytical and Nuclear Chemistry Kluwer Academic Publishers 161/2(1992-08-01), 401-411 0236-5731 161:2<401 1992 161 10967 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer