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The concentration of copper and chromium vapor after current zero of vacuum arcs between chromium-copper contacts was measured simultaneously by the atomic-absorption technique. Temperatures between 1900 K and 2200 K were derived from the absorption data, assuming that the ratio of concentrations of copper and chromium vapor is equal to the ratio of vapor pressures at a given temperature. The temperatures obtained in this way were assigned to droplets of molten contact material evaporating in flight.>
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G. Lins (1988) studied this question.
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