International Network of Nuclear Structure and Decay Data Evaluators : Need for European participation Jagdish Tuli* Na

1. International Network of Nuclear Structure and Decay Data Evaluators : Need for European participation Jagdish Tuli* National Nuclear Data Center Brookhaven National Laboratory *Email: Tuli@bnl.gov Brookhaven Science Associates

2. It’s mission ENSDF Its Status, contributors, and users International effort and support International Network of Nuclear Structure and Decay Data Evaluators

3. Multinational team of nuclear structure and decay data evaluators coordinated by the IAEA In existence since 1974 Biennial meetings held under the auspices of the IAEA Maintain and update ENSDF (Evaluated Nuclear Structure Data File) Master database held at NNDC, BNL, USA Available through various media: Web, Publications International Network of Nuclear Structure and Decay Data Evaluators

4. ENSDF ENSDF - www.nndc.bnl.gov/ensdf Contents: Evaluated nuclear structure and decay data for all known (>3000 ) nuclei, organized into over 294 mass chains ENSDF Adopted data best values Levels: E, J, T1/2, , Q, configurations Gammas: E, BR, M, , ICC Decay data - ++  -n etc. Reaction data (HI,xn) (p,p') (n,), (n,xn) Coulomb Exc. (,'), (,xn) (d,p), etc.

5. Special (horizontal)evaluations that are needed by the nuclear structure community, e.g., logft values, α- and p-decay properties, SD and magnetic rotation bands, nuclear isomers, properties of nuclei far from the line of stability, heavy and super-heavy nuclei, etc. Evaluation of decay data for nuclides that are important to various applications, e.g., in reactor calculations, homeland security, medicine, detector calibrations, nuclear waste, etc. ENSDF

6. ENSDF: Major Data Sources and Derivatives Contributing Databases: Atomic Masses (Wapstra & Audi) Nuclear Science References (NSR) • MC Codes • MCNPX • GEANT ENSDF NuDat2 IE ORTEC & CANBERRA Derivative Databases: … RIPL JANIS NUBASE MIRD RADWARE Derivative Publications:

7. Sole source of funding: US/DOE Office of Science DOE is concerned about lack of non-US contributions to ENSDF International contributions to ENSDF

8. Structure and Decay Data Evaluation for ENSDF An international effort is needed to sustain this vital resource, used worldwide. An increasingly large fraction of evaluation effort now comes from US and Canada.

9. Structure and Decay Data Evaluation for ENSDF There is dramatic disparity between contribution to and usage of final product Usage US+Canada: 44% Europe: 26% Japan: 6 % China: 4 % Former: USSR 3 % India: 3% Usage of data geographically (source: US National Nuclear Data Center, 2005) Contribution (2002-2006 average) US+Canada: ~78% Europe: ~9% Japan: ~5%

10. Numbers of participating Laboratories/Institutes in ENSDF evaluations

11. Structure and Decay Data Evaluation for ENSDF European Effort (1986 to present): • Dramatic erosion of prior European support: • Out of the 6 European structure data centers in 1986, none is currently financially supported. • Europe is a 26% user of end product but its contribution is disproportionately low (two remaining structure evaluators are retirees and have no financial support).

12. Strong international effort is needed to sustain this vital resource, used worldwide. European community is a major user of NSDD databases. Their contribution to keep them updated will be greatly appreciated. Some European groups have expressed interest in this activity. These groups should be supported. Conclusion

13. Thanks for allowing me this opportunity to bring our concerns to your attention. Thanks for your great hospitality! Conclusion