Chemical separation procedure for the nuclide analysis of a tantalum target irradiated for 500 days with 800 MeV protons
A rapid radiochemical separation procedure has been developed for the determination of long-lived and stable nuclides produced by spallation and activation in a tantalum target irradiated for 500 days with 800 MeV protons. In this procedure the matrix element tantalum and simultaneously the182Ta activity, built-up by activation of the matrix with themalized spallation neutrons is removed from many elements. About 50 mg of the sample is dissolved in a mixture of concentrated nitric and hydrofluoric acid. After dilution tantalum is extracted with a solution of 0.2M tetrahexylammonium bromide in methyl isobutyl ketone (MIBK). The residual amount of tantalum and the remaining182Ta activity are 0.0003% and the recoveries of 27 investigated elements are in the range of 96.0–99.9%. A further 22 elements are quantitatively separated according to their chemical behavior. In the final aqueous fraction the separated long-lived and stable nuclides of 49 elements can be measured with high sensitivity by γ-ray spectrometry and mass spectrometry (ICP-MS).
KeywordsTantalum Isobutyl Hydrofluoric Acid Separation Procedure Radiochemical Separation
Unable to display preview. Download preview PDF.
- 1.F. Carsughi, Research Center Jülich, private communication.Google Scholar
- 2.J. I. Garcia Alonso, D. Thoby-schultzendorff, B. Giovannone, L. Koch. J. Radioanal. Nucl. Chem., 203 (1990) 19.Google Scholar
- 3.J. Stummeyer, G. Wünsch, Fresenius J. Anal. Chem., 342 (1992) 203.Google Scholar
- 4.V. K. Panday, J. S. Becker, H. J. Dietze, Anal. Chim. Acta (in press).Google Scholar
- 5.V. Krivan, R. Hausbeck, P. Wilhartitz, R. Krismer, H. M. Ortner, Fresenius J. Anal. Chem., 341 (1991) 550.Google Scholar
- 6.R. Caletka, R. Hausbeck, V. Krivan, J. Radioanal. Nucl. Chem., 120 (1988) 319.Google Scholar
- 7.E. M. Donaldson, D. J. Charette, V. H. Rolko, Talanta 16 (1969) 1305.Google Scholar
- 8.W. J. Maeck, G. L. Booman, M. E. Kussy, J. E. Rein, Anal. Chem. 33 (1961) 1775.Google Scholar
- 9.G. Küppers, G. Erdtmann, J. Radioanal. Nucl. Chem., 189 (1995) 183.Google Scholar
- 10.A. Currie, Anal. Chem., 40 (1968) 586.Google Scholar
- 11.DIN 25482, Teil 1, Beuth Verlag, Berlin, 1989.Google Scholar
- 12.G. Erdtmann, H. Petri, Nuclear Activation Analysis: Fundamentals and Techniques, in:Kolthoff-Elvin: Treatise on Analytical Chemistry, 2nd ed. byPh. J. Elving, Part 1, Vol. 14, J. Wiley & Sons, New York, 1986, p. 419 ff.Google Scholar