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- W2246074147 abstract "The tungsten content in scheelite concentrates was determined by irradiating a sample 1.5 hours with neutrons from a polonium-beryllium source containing 8 curies of polonium. The sample was held for 20 minutes to allow short half-life activities of Al and Si to die out, and the induced 1.33 mev beta activity of W/sup 187/ (T/sub 1/2/ = 24.1 hrs) w as counted on an end-window counter. Other elements accompanying the tungsten in the scheelite concentrate have a low capture cross-section (Si, Sn, Ca, Fe, S, Mg, Ni), or are present in such low concentrations that they do not interfere with the determination of tungsten (elements such as Cu, As, Mn, Na and P). A plot of tungsten content versus the induced beta activity in counts per minute gave a straight line for samples of scheelite mixed with fluorite. This method can be used to determine tungsten in steels and cermets. (TTT)" @default.
- W2246074147 created "2016-06-24" @default.
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- W2246074147 date "1961-04-01" @default.
- W2246074147 modified "2023-09-24" @default.
- W2246074147 title "THE USE OF NEUTRON ACTIVATION ANALYSIS FOR THE DETERMINATION OF THE TUNGSTEN CONTENT IN MINERALS AND BENEFICIATED CONCENTRATES" @default.
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