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Niobium metal, of 99.999% nominal purity, in the form of 0.02 and 0.1 mm thick foil and of 0.5 mm diameter wire, has been certified for its tantalum mass fraction. The certified value of the tantalum mass fraction, 0.3 +/- 0.09 mg/kg, is based on 70 results obtained by six independent laboratories by neutron activation analysis or inductively coupled plasma mass spectrometry. The material is to be used as a reference material in neutron metrology.

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Authors: LIEVENS F, JRC Geel (BE);INGELBRECHT C, JRC Geel (BE);PAUWELS J, JRC Geel (BE);SCHULZE K (EDITORS), Max-Planck-Institut für Metallforschung, Stuttgart (DE)
Bibliographic Reference: EUR 12894 EN (1990) 15 pp., FS, ECU 5
Availability: (2)
ISBN: ISBN 92-826-1577-4
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