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Absolute isotopic composition and atomic weight of erbium

1998; Elsevier BV; Volume: 177; Issue: 2-3 Linguagem: Inglês

10.1016/s1387-3806(98)14057-5

1873-2798

Tsing-Lien Chang, Mo‐Tian Zhao, Wenjun Li, Jun Wang, Qiu-Yu Qian,

Nuclear and radioactivity studies

Calibrated mass spectrometric measurements on highly enriched isotopes of erbium in the form of oxides of well-defined purity were carried out by using a thermal ionization mass spectrometer, yielding an absolute isotopic composition of 0.139(3) at. % 162Er, 1.601(2) at. % 164Er, 33.503(24) at. % 166Er, 22.869(6) at. % 167Er, 26.978(12) at. % 168Er, and 14.910(24) at. % 170Er, and the atomic weight of erbium as 167.2591(9) with an uncertainty given on the basis of 95% confidence limit. No isotopic fractionation was found in terrestrial normal erbium materials.