Isolation of reactor-borne neptunium using ion specific extraction chromatography resins and detection by gamma spectroscopy
Although actinides are the most informative elements with respect to the nature of a nuclear accident, plutonium analysis is complicated by the background created by fallout from nuclear explosions. Therefore, 239Np, a short-lived actinide (T1/2 = 2.4 d) that emits several gamma rays, is proposed herein as a suitable proxy. The most prominent photopeaks from 239Np are at 106 keV, 228 keV, and 278 keV. However, the 106 keV and 228 keV photopeaks of 239Np are also characteristic of 129mTe and 132Te, volatile fission products with half-lives of 33.6 days and 3.2 days, respectively. Although not ...
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