Abstract
The Decay Data Evaluation Project (DDEP), is an international collaboration of decay data evaluators formed with groups from France, Germany, USA, China, Romania, Russia, Spain and the UK, mainly from the metrology community. DDEP members have evaluated over 220 radionuclides, following an agreed upon methodology, including a peer review. Evaluations include all relevant parameters relating to the nuclear decay and the associated atomic processes. An important output of these evaluations are recommendations for new measurements, which can serve as a basis for future measurement programmes. Recently evaluated radionuclides include: 18 F, 59 Fe, 82 Rb, 82 Sr, 88 Y, 90 Y, 89 Zr, 94m Tc, 109 Cd, 133 Ba, 140 Ba, 140 La, 151 Sm and 169 Er. The DDEP recommended data have recently been incorporated into the JEFF-3.3 Radioactive Decay Data Library. Other sources of nuclear data include 900 or so radionuclides converted from the Evaluated Nuclear Structure Data File (ENSDF), 500 from two UK libraries (UKPADD6.12 and UKHEDD2.6), the IAEA Actinide Decay Data Library, with the remainder converted from the NUBASE evaluation of nuclear properties. Mean decay energies for a number of radionuclides determined from total absorption gamma-ray spectroscopy (TAGS) have also been included, as well as more recent European results from TAGS measurements performed at the University of Jyvaskyla by groups from the University of Valencia, Spain and SUBATECH, the University of Nantes, France. The current status of the DDEP collaboration and the JEFF Radioactive Decay Data Library will be presented.
Highlights
The Decay Data Evaluation Project (DDEP) [1], is an international collaboration founded in 1995, following an initial agreement in 1994 between the Laboratoire National Henri Becquerel (LNE-LNHB), France, and the Physikalisch-Technische Bundesanstalt (PTB), Germany, both of which are the recognised National Metrology Institutes (NMIs) for ionising radiation in their respective countries
Other sources of nuclear data include 900 or so radionuclides converted from the Evaluated Nuclear Structure Data File (ENSDF), 500 from two UK libraries (UKPADD6.12 and UKHEDD2.6), the International Atomic Energy Agency (IAEA) Actinide Decay Data Library, with the remainder converted from the NUBASE evaluation of nuclear properties
The DDEP recommended data have recently been incorporated into the JEFF Radioactive Decay Data Library, which forms part of the suite of nuclear data libraries produced under the auspices of the Joint Evaluated Fission and Fusion (JEFF) file project of the OECD Nuclear Energy Agency [2]
Summary
The Decay Data Evaluation Project (DDEP) [1], is an international collaboration founded in 1995, following an initial agreement in 1994 between the Laboratoire National Henri Becquerel (LNE-LNHB), France, and the Physikalisch-Technische Bundesanstalt (PTB), Germany, both of which are the recognised National Metrology Institutes (NMIs) for ionising radiation in their respective countries. In accordance with the assessment of fission product decay data for decay heat calculations c The Authors, published by EDP Sciences. Undertaken by sub-group 25 of the OECD/NEA Working Party on International Nuclear Data Evaluation Cooperation (WPEC) [7], mean decay energies for a number of radionuclides determined from total absorption gammaray spectroscopy (TAGS) have been included [8], as well as more recent European results from TAGS measurements performed at the University of Jyvaskyla, Finland, by groups from the University of Valencia, Spain [9, 10] and SUBATECH, the University of Nantes, France [11]
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