Aurelian Luca (IFIN-HH, Romania) The Decay Data Evaluation Project – an international cooperation in the field of nuclear data

History Following the increasing demand of users for basic nuclear data, such as half-life, decay mode and branching, energy and probabilities of transitions an international collaboration was initiated in 1995 by CEA/LNHB (France), PTB (Germany), KRI (Russia) and INEEL, LBNL and BNL (USA): Decay Data Evaluation Project (DDEP).

The GOAL: to produce carefully evaluated nuclear and atomic decay data for the radionuclides of interest, data that are reliable and accurate, with free access for the worldwide users (nuclear power industry, environmental monitoring, nuclear medicine, radionuclide metrology etc.) At the General Meeting (Oxford, September 2005) of the International Committee for Radionuclide Metrology (ICRM) the Delegates formally approved the recommendation made by the Nuclear Data Working Group of using the DDEP evaluated decay data in all future nuclear data studies.

Evaluated Data -Half-life, Q -Decay scheme, levels (E, spin and parity), branching ratios, production mode -Energy and transition probabilities (α,β,EC, γ,X), photon emission intensities, ICCs, -Energy and emission probabilities of Conversion electrons and Auger electrons -log ft and type of beta transition -Fluorescence yields -References

Data Evaluation Rules The adopted data evaluation rules are:  Critical analysis of published results  Results without uncertainties are not used  One result per laboratory included  Rejection of some values is always discussed  Private communications are, a priori, not accepted, except in the exceptional case where there is no published value available  Some uncertainties affecting individual results can be “revisited” in the light of the Guide to the expression of Uncertainty in Measurement (BIPM GUM)  Statistical process

Evaluation Tools Software: SAISUNUC (CEA/LNHB) with other tools: BrIcc, Lweight, Emission, Emi- X, log ft etc. Each evaluation of a radionuclide has two files: Tables and Comments; peer-review process before its publication in the DDEP free online database: NUCLEIDE (

Publications Web site : fr/

The BIPM-5 series is published by the BIPM on behalf of the Consultative Committee for Ionizing Radiation (CCRI). The aim is to review various topics that are of importance for the measurement of ionizing radiation and radioactivity, in particular, those techniques normally used by participants in international comparisons. It is hoped that these publications will prove to be useful reference volumes both for those who are already engaged in this field and for those who are approaching such measurements for the first time.

The purpose of the Monographie BIPM-5 is to present the recommended values of nuclear decay data for a wide range of radionuclides.

1) First volume 1999: 3 H, 14 C, 22 Na, 26 Al, 35 S, 36 Cl, 40 K, 55 Fe, 58 Co, 60 Co, 65 Zn, 68 Ga, 68 Ge, 75 Se, 95 Zr, 95 Nb, 95 Nb m, 111 In, 113 In m, 113 Sn, 123 Te m, 125 I, 137 Cs, 139 Ce, 141 Ce, 188 Re, 192 Ir, 194 Ir, 207 Bi. 2) Two volumes of the Monographie BIPM-5 vol. 1 & 2, 2004: 7 Be, 11 C, 13 N, 15 O, 18 F, 24 Na, 32 P, 33 P, 44 Sc, 44 Ti, 46 Sc, 51 Cr, 54 Mn, 56 Mn, 57 Co, 57 Ni, 59 Fe, 64 Cu, 66 Ga, 67 Ga, 85 Kr, 88 Y, 89 Sr, 93 Nb m, 99 Mo, 99 Tc m, 109 Cd, 110 Ag, 110 Ag m, 123 I, 123 Te m, 125 Sb, 129 I, 131 I, 131 Xe m, 133 Ba, 140 Ba, 140 La, 152 Eu, 153 Gd, 153 Sm, 154 Eu, 155 Eu, 166 Ho, 166 Ho m, 169 Yb, 170 Tm, 177 Lu, 201 Tl, 203 Hg, 204 Tl, 208 Tl, 212 Pb, 212 Bi, 212 Po, 216 Po, 220 Rn, 224 Ra, 226 Ra, 227 Th, 228 Th, 238 Pu, 240 Pu, 241 Am, 242 Pu. 3) Monographie BIPM-5 vol. 3 was published in 2006: 3 H, 55 Fe, 56 Co, 60 Co, 63 Ni, 65 Zn, 79 Se, 90 Sr, 90 Y m, 90 Y, 108 Ag m, 108 Ag, 111 In, 125 Sb, 137 Cs, 153 Sm, 159 Gd, 203 Pb, 233 Pa, 233 Th, 234 U, 236 Np, 236 Np m, 237 U, 238 U, 242 Cm, 243 Am, 244 Cm. 4) Fourth volume of the Monographie BIPM-5 vol. 4, in 2008: 133 I, 133 Xe, 133 Xe m, 139 Ce, 206 Tl, 210 Tl, 210 Pb, 210 Bi, 214 Pb, 214 Po, 214 Bi, 218 At, 218 Rn, 218 Po, 222 Rn, 226 Ra, 237 Np, 238 Np, 239 U, 239 Np, 239 Pu, 241 Pu, 246 Cm, 252 Cf. 5) Fifth volume of the Monographie BIPM-5 vol. 5, in 2010: 22 Na, 40 K, 75 Se, 124 Sb, 207 Bi, 211 Bi, 217 At, 225 Ra, 225 Ac, 228 Ra, 231 Th, 232 Th, 233 Th, 233 Pa, 234 Th, 235 U, 237 U, 238 Pu, 240 Pu, 241 Am, 242 Pu, 242 Am, 243 Am, 244 Am, 244m Am. 6) Sixth volume of the Monographie BIPM-5 vol. 6, in 2011: 41 Ar, 59 Ni, 64 Cu, 99 Tc, 109 Pd, 125 I, 132 Te, 182 Ta, 209 Pb, 209 Po, 211 Po, 215 Po, 215 At, 219 At, 219 Rn, 223 Fr, 223 Ra, 228 Ac, 231 Pa, 234 Pa, 234m Pa, 236 Np, 237 Np, 239 U, 242m Am.

7) Monographie BIPM-5, vol. 7, in 2013: 14 C, 35 S, 36 Cl, 37 Ar, 45 Ca, 67 Ga, 68 Ga, 68 Ge, 127 Sb, 127 Te, 127m Te, 134 Cs, 141 Ce, 147 Nd, 147 Pm, 195 Au, 206 Hg, 207 Tl, 208 Tl, 209 Tl, 211 Pb, 211 At, 213 Bi, 215 Bi, 228 Th, 242 Cm, 243 Cm, 244 Cm, 245 Cm.

DDEP Workshops CEA-LNHB, Saclay, France: 2006 IFIN-HH, Bucharest, Romania: 2008 CIEMAT, Madrid, Spain: 2010 LNE-LNHB, Paris, France: 8-10 October 2012 Workshop period - 3 days: news, technical problems, funding projects, cooperation, training for young evaluators.

LNE-LNHB, Paris, France: 8-10 October 2012

The current DDEP evaluators are : Marie-Martine Bé (LNHB,France); Coordinator, Editor Filip G. Kondev (ANL, United States of America); Valery P. Chechev (KRI, Russia) Christophe Dulieu, Mark Kellett, Xavier Mougeot (CEA/LIST, LNE-LNHB, France) Alan L. Nichols (Surrey University, UK) Edgardo Browne (LBNL, United States of America) Tibor Kibédi (ANU, Australia) Aurelian Luca (IFIN-HH, Romania) Andy Pearce, Arzu Arinc (NPL, UK) Huang Xiaolong (CIAE, China)

THANKS: Marie-Martine Bé, Charlène Bisch, Christophe Dulieu, Mark Kellett, Xavier Mougeot, Vanessa Chisté (CEA- LIST/LNHB, France) All the other DDEP evaluators and reviewers EURAMET EMRP JRP ENG08 MetroFission, IFIN-HH and ANCS (Romania) - Program Nucleu PN , for funding the Workshop Improved Nuclear Decay Data (IN2DAT). The staff of the Radionuclide Metrology Laboratory (LMR), IFIN-HH, especially Dr. Maria Sahagia, Head of LMR.