Browsing by Author "Seatonberry, BW"

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    AAEC tritium list no.1, 1970-1974
    (Australian Atomic Energy Commission, 1976-01) Calf, GE; Seatonberry, BW; Smith, LW; Stokes, RC
    Details are given of the concentration of the environmental isotope tritium in monthly samples of precipitation taken at 16 stations, situated throughout Australia, during the period 1970-1974.
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    The measurement of natural levels of tritium in water.
    (Australian Atomic Energy Commission, 1976-07) Calf, GE; Seatonberry, BW; Smith, LW
    This paper describes equipment and techniques used in the tritium laboratory at the Australian Atomic Energy Commission Research Establishment for the determination of low level activities of tritium in water samples. Samples are enriched by electrolysis in sixteen glass cells connected in series. An enrichment of about 25 times and an enrichment factor of about 0.85 are obtained. A calibrated ampere-hour meter in series with a precision shunt measures the weight of water electrolysed and a preset counter is used to shut off the current when 20 g of electrolyte remains in each cell. After distillation the enriched samples are counted in Teflon vials using emulsion liquid scintillation techniques. The accuracy of measurements is discussed and applied to routine measurements. The overall standard deviation for samples having an activity greater than 5 'tritium units' is less than 10%.
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    The use of radioisotopes as ground-water tracers in the burdekin delta area of North Queensland, Australia
    (Australian Atomic Energy Commission, 1965-05) Andrew, JTG; Ellis, WR; Seatonberry, BW; Wiebenga, WA
    The radioisotopes iodine —131 and tritium were used to determine aquifer porosities and permeabilities in a series of pumped bore tests. If reasonable values for porosity can be assumed, the methods can also be used to estimate the thickness of an aquifer. The direction and rate of flow of natural ground-water was also determined by means of a free flow test, using these isotopes.