THE ISOTOPIC ABUNDANCE OF ANTIMONY

With highly enriched isotopes of antimony in the form of 100% pure sesquioxide, a truly calibrated mass spectrometric measurement was carried out on a solid ion source thermal ionization mass spectrometer, yielding an absolute isotopic abundance of 57.213(32) at. % Sb-121 and 42.787(32) at. % Sb-123, and the atomic weight of antimony as 121.7597(7) on 2 SD basis. No isotopic fractionation was found in terrestrial normal antimony materials.Physics, Atomic, Molecular & ChemicalSpectroscopySCI(E)19ARTICLE177-8212