| Autor: |
A. N. Berlizov, E. Zuleger, P. van Belle, H. Ottmar |
| Rok vydání: |
2010 |
| Předmět: |
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| Zdroj: |
Applied radiation and isotopes : including data, instrumentation and methods for use in agriculture, industry and medicine. 69(2) |
| ISSN: |
1872-9800 |
| Popis: |
Because of the very low specific activity of (242)Pu, the non-destructive assay of this isotope by means of conventional high-resolution gamma-spectrometry (HRGS) is possible only for Pu samples highly rich in (242)Pu. For bulk samples suffering from the gamma self-attenuation and self-fluorescence effects, the only practical choice for the quantitative analysis of (242)Pu is the weak γ-line emitted in the 159 keV transition of its α-decay daughter (238)U. A recent study revealed a significant disagreement between the (242)Pu mass values in a 99.72% enriched (242)PuO(2) sample as reported by HRGS and neutron coincidence counting. This fact motivated the present study on the experimental re-evaluation of the γ-emission probability for the 159 keV transition using a combination of α-, γ- and mass-spectrometry techniques. The obtained new emission probability P(2)=(2.20±0.08)10(-6) turned out to be ≈35% smaller than the currently adopted value. The study also suggested a new value E(2)=159.018±0.016 keV for the energy of the respective γ-ray. |
| Databáze: |
OpenAIRE |
| Externí odkaz: |
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