1963 Volume 36 Issue 6 Pages 692-696
1) By irradiation of a tin target (antimony content, less than 8×10−4%) with 15 MeV. protons (120 μ amp. hr.), about 1 mc. of 120Sb was produced, with a specific activity more than 30 μc. per μg of antimony.
2) The radioactive antimony was either separated by extraction with amylacetate from more than 6 N hydrochloric acid containing tin(IV) or by cation exchange in a 0.4% tartaric acid solution of pH 0.6 to 1.6 containing tin-(II).
3) 120Sb is electrolytically deposited on an evaporated film of silver or copper from a 1 to 3N hydrochloric acid solution containing 1% hydroxylamine hydrochloride with a yield of 70% within 3 hr.
4) Care should be taken to avoid hydro-lytic aging of antimony in diluted hydrochloric acid, which vitiates the extraction, the ion exchange, and the electrolysis.
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