Absolute isotopic composition and atomic weight of germanium

Citation
Tl. Chang et al., Absolute isotopic composition and atomic weight of germanium, INT J MASS, 189(2-3), 1999, pp. 205-211
Citations number
21
Language
INGLESE
art.tipo
Article
Categorie Soggetti
Spectroscopy /Instrumentation/Analytical Sciences
Journal title
INTERNATIONAL JOURNAL OF MASS SPECTROMETRY
ISSN journal
1387-3806 → ACNP
Volume
189
Issue
2-3
Year of publication
1999
Pages
205 - 211
Database
ISI
SICI code
1387-3806(19990811)189:2-3<205:AICAAW>2.0.ZU;2-3
Abstract
Gravimetric synthetic mixtures prepared from highly enriched isotopes of ge rmanium in the form of oxides of well defined purity were used to calibrate a thermal ionization mass spectrometer. Measurements on natural germanium samples yielded an absolute isotopic composition of 20.38(10) at. % Ge-70, 27.34(9) at. % Ge-72, 7.75(5) at. % Ge-73, 36.71(9) at. % Ge-74, and 7.82(4 ) at. % Ge-76, and the atomic weight of germanium as 72.639(7) both with an uncertainty given on the basis of 95% confidence limit. No isotopic fracti onation was found in terrestrial normal germanium materials. (Int J Mass Sp ectrom 189 (1999) 205-211) (C) 1999 Elsevier Science B.V.