Assessment of actinide decay data evaluations: Findings of an IAEA Coordinated Research Project

Kellett, Mark A.

doi:10.1016/j.apradiso.2012.02.036

Cited by 18 publications

(8 citation statements)

References 20 publications

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“…A list of specific needs for improved actinide decay data has recently been outlined in a review by the IAEA [24], [25]. Responding to those needs, an objective of this project was to measure the alpha-particle emission probabilities of , using highly enriched material with certified isotopic composition.…”

Section: E Nuclear Decay Datamentioning

confidence: 99%

“…NMIs have a proven record of providing accurate decay data such as half-lives and alpha-particle emission probabilities. It was decided to perform alpha-particle emission probability measurements in the decay of , for which decay data were very scarce and an explicit demand for better data had been expressed [24], [25]. To achieve this goal, extensive tests were needed to optimize the source preparation by electrodeposition [26], the sources had to be measured for 1-2 years in several detectors [27] and a magnet system had to be developed to eliminate interfering conversion electrons that distorted the alpha spectrum [28].…”

Section: E Nuclear Decay Datamentioning

confidence: 99%

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Metrology for New Generation Nuclear Power Plants–MetroFission

Johansson

Filtz

DeFelice

et al. 2014

IEEE Trans. Nucl. Sci.

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This EMRP (European Metrology Research Programme) project, MetroFission, has been looking at solving metrological problems related to a new generation of nuclear power plants. The proposed Generation IV power plants are designed to run safely, make efficient use of natural resources, minimize the waste and maintain proliferation resistance. In order to reach these goals, the reactor operation involves higher temperatures, high-energy neutron fluence, different types of fuel where the minor actinides are included etc. In this overview of the multidisciplinary project, which has 12 partners in 10 countries, the work described has focused on improved temperature measurements, investigation of thermal properties of advanced materials, determination of new and relevant nuclear data and development of measurement techniques for radionuclides suitable for Generation IV power plants.

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Section: E Nuclear Decay Datamentioning

confidence: 99%

Section: E Nuclear Decay Datamentioning

confidence: 99%

Metrology for New Generation Nuclear Power Plants–MetroFission

Johansson

Filtz

DeFelice

et al. 2014

IEEE Trans. Nucl. Sci.

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“…A coordinated research project of the IAEA [12] has identified a need for more accurate decay data for 243 Am, comprising the half-life value as well as the alpha and gamma emission characteristics. The longest-lived and most common isotopes of americium, 241 Am and 243 Am, have halflives of 432.6 (6) a and 7367 (23) a, respectively [13].…”

Section: Introductionmentioning

confidence: 99%

Absolute and relative measurement of the 243Am half-life

Marouli

Pommé

Jobbágy

et al. 2020

J Radioanal Nucl Chem

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The half-life of 243Am has been measured by an absolute and a relative method, i.e. by determining the specific activity of 243Am and the specific activity ratio with 241Am. A mixed 241,243Am reference material was produced and certified for its americium mass content and its isotope amount ratios. The characterisation of the mass content of 243Am was established by isotope dilution mass spectrometry using an 241Am spike, produced from highly enriched 241Pu material. The isotope amount ratios n(241Am)/n(243Am) and n(242mAm)/n(243Am) were measured by thermal ionisation mass spectrometry. Activity measurements were performed by alpha-particle counting at a defined solid angle, as well as high-resolution alpha-particle spectrometry. From the 243Am/241Am activity and isotopic amount ratios, a value of 16.988 (24) was derived for the 243Am/241Am half-life ratio. Using a value of 432.6 (6) a for the 241Am half-life, the corresponding 243Am half-life value, 7349 (15) a, is in good agreement with the result obtained from the absolute method, 7342 (14) a. The mean value, 7345 (14) a, agrees well with data from literature and lowers the relative standard uncertainty to 0.2%.

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“…IAEA, according to the CRP F42006 (Updated decay data library for Actinides) [2] and two consultants meetings on the calculation of the decay heat induced by nuclear fission. The results will be used in the future to solve some present inconsistencies and perform better nuclear structure and decay data evaluations by the international networks of evaluators.…”

Section: Introductionmentioning

confidence: 99%

Lessons Learned From Nuclear Decay Data Measurements in the European Metrology Research Programme ‘Metro Fission’

Pommé

Loidl

Garcı́a-Toraño

et al. 2014

IEEE Trans. Nucl. Sci.

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Nuclear decay data measurements were performed in the frame of a EURAMET project. Two specific goals were addressed: (1) High-precision measurements of 238 U alphaparticle emission probabilities and (2) experimental characterization of the shape of beta spectra using cryogenic detectors. In the paper, specific lessons learned from the metrological work are highlighted. This includes effects of source preparation on the quality of alpha and beta spectrometry, the influence of exchange effects on beta spectra and the use of a magnet system to eliminate coincidence effects by conversion electrons in alpha-particle spectra.

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Assessment of actinide decay data evaluations: Findings of an IAEA Coordinated Research Project

Cited by 18 publications

References 20 publications

Metrology for New Generation Nuclear Power Plants–MetroFission

Metrology for New Generation Nuclear Power Plants–MetroFission

Absolute and relative measurement of the 243Am half-life

Lessons Learned From Nuclear Decay Data Measurements in the European Metrology Research Programme ‘Metro Fission’

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