Isotope dilution gamma spectrometry for Pu using low energy photons
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Abstract
Isotope dilution gamma spectrometry (IDGS) for determination of the Pu concentration, using high resolution gamma-ray spectrometry (HRGS) in the 40–150 keV energy range, is developed and described. The methodology involves purification of Pu by an anion exchange procedure, followed by the determination of Pu isotopic composition using HRGS. For isotope dilution, a pre-calibrated power reactor grade Pu (∼ 70 at. % 239Pu) solution from an Indian PHWR was used as a spike for research reactor grade Pu (∼ 95 at. % 239Pu) samples and vice versa. Changes in 240Pu/239Pu (45.24 keV/51.62 keV) and 241Pu/239Pu (148.57 keV/129.29 keV) activity ratios in the spiked samples were determined by gamma spectrometry. Using the atom ratios calculated from the measured activity ratios, the concentration of Pu in the sample was calculated using two different efficiency calibration methods. The isotopic composition and concentration of Pu samples both from power reactor and research reactor grade agreed well with the values obtained by isotope dilution-thermal ionization mass spectrometry. The present method also shows the superiority of using the 240Pu/239Pu atom ratio against the 241Pu/239Pu atom ratio in IDGS with respect to the accuracy and precision.
© by Oldenbourg Wissenschaftsverlag, Trombay, Mumbai 400 085, Germany
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Articles in the same Issue
- Historical Item
- On-line gas chromatographic studies of Nb, Ta, and Db bromides
- Isotope dilution gamma spectrometry for Pu using low energy photons
- A new uranyl benzoate species characterized by different spectroscopic techniques
- Speciation of U(VI) sorbed onto ZrP2O7 in the presence of citric and oxalic acid
- A novel biamperometric methodology for thorium determination by EDTA complexometric titration
- The influence of temperature and small organic ligands on the sorption of Eu(III) on Opalinus Clay
- Tetraphenylpyridinium pertechnetate: a promising salt for the immobilization of technetium
- Impact of water environmental change and migration of radionuclides on Hokutolite conservation in Peito (Taiwan)
- In vivo biological evaluation of 131I radiolabeled-paclitaxel glucuronide (131I-PAC-G)
- Neutron activation analysis and atomic absorption spectrophotometry for the analysis of fresh, pasteurized and powder milk
