Radiochemical measurement of 237Np in a solution of mixed radionuclides: Experiences in chemical separation and alpha-spectrometry |
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| Authors: | J. La Rosa I. Outola E. Crawford S. Nour H. Kurosaki K. Inn |
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| Affiliation: | (1) National Institute of Standards and Technology, 100 Bureau Drive, Mailstop 8462, Gaithersburg, MD 20899-8462, USA;(2) Colorado State University, Fort Collins, CO 80523, USA |
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| Abstract: | ![]()
A radiochemical procedure is described for the measurement of 0.1 Bq 237Np in a solution containing similar activity concentrations of Th, U, Pu and Am as well as activity concentrations of 60Co, 90Sr and 137Cs one hundred times higher. A tracer of 239Np (milked from 243Am) was used as an isotopic spike for chemical yield determination. The relationship between gamma-counting geometries for ampoule (liquid) and NdF3 (solid) 239Np sources was established so that Np chemical yields could be measured by a comparative method. Efficiencies of alpha-spectrometers for 237Np in NdF3 sources were measured by a bootstrap technique. Two sets of experiments were designed and used to test out the procedure. |
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