Abstract
The feasibility of determining copper in copper ores by means of activation with 14-MeV neutrons has been investigated. In the method the 63Cu(n, 2n) 62Cu reaction and a coincidence measurement of the gamma radiation from the annihilation of positrons from the decay of 63Cu is used. The relative error is of the order of 2%, and the mean time needed for a single determination is of the order of 4 min. The influence of other positron-emitting elements contained in the ore has been studied theoretically; it results in an average overestimate of the copper content of about 0.05 %. The method can be applied with advantage when the demand for analyses is a few hundred per day.
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