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Related to cobalt-57: Cobalt-60, cobalt 58
  • noun

Synonyms for cobalt

a hard ferromagnetic silver-white bivalent or trivalent metallic element

References in periodicals archive ?
Small amounts of longer-lived isotopes used in radioimmunoassays -- such as cobalt-57 tritium, and carbon-14 -- enter the sewage system, she says, though they are "in such a diluted state that they pose no health risk.
The flatter curve matches the slower decay of another isotope, cobalt-57, which the supernova produced in smaller amounts, the group notes.
One way to explain the greater emissions, note Suntzeff and his colleagues, is to assume that the supernova produced a ratio of cobalt-57 to cobalt-56 five times the ratio typical in our solar system.
GRO measured the spectra of gamma rays from 1987A, which should allow researchers to calculate the amount of cobalt-57 produced by the supernova.