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Barringer (lake and stream sediment) NADNC (U-flux 8x10**13, d.l.=0.5 ppm)
Barringer, lake and stream sediment; neutron activation-delayed neutron activity (uranium) d.l. = 0.5 ppm
Uranium was determined using a neutron activation method with delayed neutron counting. With the exception of the irradiation facility, the method is very similar to that used by AECL in previous years, a detailed description of which is provided by Boulanger et al. (1975). A two gram sample was irradiated for 10 seconds in the Triga reactor located at Washington State University. The operating flux was 8 x 10** 13 neutrons/sq cm/sec. After a 10 second delay, the sample was counted for 10 seconds. The counting equipment was of AECL design. Calibration was done twice a day or as required. One standard was analysed after every 20 samples.
Boulanger, A., Evans, D.J.R. and Raby, B.F. (1975). Uranium analysis by neutron activation delayed neutron counting. Proc. Of the 7th Annual Symp of Canadian Mineral Analysts, Thunder Bay, Ontario, Sept 22-23, 1975.
Sample material: solid
Sample weight: unstated
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