# The Decay Data Evaluation Project (DDEP) and the JEFF-3.3 radioactive decay data library: Combining international collaborative efforts on evaluated decay data

1 LNHB - Laboratoire National Henri Becquerel
DM2I - Département Métrologie Instrumentation & Information : DRT/LIST/DM2I
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, $^{94}$mTc, $^{109}$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.
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Cited literature [34 references]

https://hal-cea.archives-ouvertes.fr/cea-01809227
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M.A. Kellett, O. Bersillon. The Decay Data Evaluation Project (DDEP) and the JEFF-3.3 radioactive decay data library: Combining international collaborative efforts on evaluated decay data. ND 2016: International Conference on Nuclear Data for Science and Technology, Sep 2016, Bruges, Belgium. pp.02009, ⟨10.1051/epjconf/201714602009⟩. ⟨cea-01809227⟩

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