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INAA of Zr,La, Ce and Nd in geological samples in the presence of different uranium concentratios
Authors:S. M. Al-Jobori  M. J. Al-Atia  M. Jalil  A. K. Hussien
Affiliation:(1) Nuclear Research Center, Tuwaitha, P.O. Box 765, Baghdad, (Iraq);(2) Present address: State Establishment of Geological Survey and Mineral Investigation, P.O. Box 986, Baghdad
Abstract:Rock samples which contain relatively high concentrations of uranium may create problems of interference produced by fission products, when instrumental neutron activation analysis is used. The isotopes95Zr,140La,141Ce, 143Ce and 147Nd, which are commonly used in the neutron activation analysis of the corresponding elements, are also produced as fission products of235U. For each of these radioisotopes, a contribution factor is calculated theoretically and meaured experimentally using geological samples with different uranium contents.
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