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Rare-earth elemental analysis of banded iron-formations by instrumental neutron activation analysis |
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| Authors: | P K Nayak B Wierczinski S Lahiri |
| Institution: | 1. Department of High Energy Physics, Tata Institute of Fundamental Research, Homi Bhabha Road, Mumbai, 40005, India 2. Department of Basic Sciences, A.K., College of Engineering, Krishnankoil, Tamilnadu, 626 190, India 3. Department of Radiochemistry, Interfaculty Reactor Institute, Delft University of Technology, Mekelweg 15, 2629 JB, Delft, The Netherlands 4. Institute for Radiochemistry, Technische Universit?t München, Walther-Meissner-Strasse 3, 85748, Garching, Germany 5. Chemical Sciences Division, Saha Institute of Nuclear Physics, Bidhan Nagar, Kolkata, 700 064, India |
| Abstract: | Representative banded iron-formations (BIFs) from various locations of the eastern Indian geological belt were investigated by instrumental neutron activation analysis (INAA). After pre-concentration, irradiation was carried out using a neutron flux of 5.1·1016 m−2·s−1, 1.0·1015 m−2·s−1 and 3.7·1015 m−2s−1, with thermal, epi-thermal and fast neutrons, respectively. The activities in these samples were measured by a HPGe detector. Ten rare-earth elements, such as La, Ce, Nd, Sm, Eu, Tb, Ho, Tm, Yb and Lu, have been qualitatively identified and quantitatively estimated in these samples. The present investigation is an example of employing a pre-concentration method for high iron-containing ores prior to neutron activation analysis. |
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