TUNL Contributions in the US Nuclear Data Program (USNDP) & Nuclear Structure and Decay Data (NSDD) network Nuclear Structure Data Evaluation Program J.H. Kelley - USNDP Structure Group Chair: (5 months FTE), J. Purcell (emeritus 0.1 FTE), G. Sheu (Adm. Assist FTE) & Kent Leung (post doc 0.5 FTE) This material is based upon work supported by the U.S. Department of Energy, Office of Science, Office of Nuclear Physics.

A Simple view of Nuclear Data? Utilities, Applications, Annals of Knowledge Validation Refinement Discovery Science Ideas &Data

What is Nuclear Data? … too applied to the basic physics …too academic to the applied physics … Generally: any result produced in a NP experiment can qualify Historically: associated with neutron cross sections and fission like applications

Provides the bridge between Basic Science and Applied Science Motivates curiosity of the unknown Nuclear Data merges what we can measure with what we can understand. Extends our ability to accomplish new feats Helps us understand the world around us

Primary Activities of USNDP Evaluation: Evaluated Nuclear Structure Data File (ENSDF/IAEA) Evaluated Nuclear Data File (ENDF) Compilation: Nuclear Science Reference database (NSR) eXperimental Unevaluated Nuclear Data Library (XUNDL) EXperimental nuclear reaction data (EXFOR/IAEA) Dissemination: NNDC Website Repackaging/ tailored user interfaces: NuDat, Nuclear Data Sheets, Table of Isotopes RIPL, Medical Internal Radiation Dose Program, MCNP, GEANT4, CINDER90, etc… Experiment: Basic Science, Horizontal studies, Data for validation studies. TUNL data group website

TUNL Evaluation Activities We are responsible for nuclear structure evaluation in the A=2-20 mass region Energy Levels of Light Nuclei reviews published in Nucl. Phys. A –Follow style of Fay Ajzenberg-Selove –Broad scope of reactions is included – discussion format. –Adopted levels/gammas, Energy Level Diagrams Evaluated Nuclear Structure Data File (ENSDF) for A=2-20 –More rigorous information required –Better documentation of original sources –Evaluate reaction data sets/decay data sets –Deduce Adopted levels/gammas, decay widths, etc. eXperimental Unevaluated Nuclear Data Library (XUNDL) A=2-20 –ENSDF style compilation of current literature Web interface for A=3-20 Information

Contents: Evaluated experimental nuclear structure and decay data for all known nuclei, organized in over 260 mass A-chains ENSDF is the main product of the USNDP Structure Group & NSDD Adopted (best values) Levels: (E, J , T 1/2, , Q, configurations) Gammas: (E , BR, M, , ICC) Decays  -  +  +   - n etc. Reactions (HI,xn  ) (p,p’) (n,  ), (n,xn  ) Coul. Exc. ( ,  ’), ( ,xn  ) (d,p), etc. ENSDF

Evaluated Nuclear Structure Data File ENSDF database plays a seminal role in scientific discoveries & many applications  the only Nuclear Structure database that is updated continuously –  contains level properties & decay radiations for ALL nuclei  Coordination is supported by NNDC and the IAEA/NSDD network MIRD RADWARE Monte-Carlo Codes MCNP, GEANT, EGS4 ORIGEN, CINDER90 NUBASE RIPL ORTEC & CANBERRA ENSDF Applications ENDF, JEFF, JENDL … Simulations Basic NP Research RNAL PGAA NuDat astrophysics IE No viable alternative exists in the world!

USNDP evaluatorsInternational evaluators

Present Evaluation Activities Published “Energy Levels of Light Nuclei: A=3” Purcell, et al., Nucl. Phys. A848 (2010) 1 “Energy Levels of Light Nuclei: A=11” Kelley, et al., Nucl. Phys. A880 (2012) 88 (ENSDF Updated) Work in progress: –A=12 Evaluation for “Energy Levels” (J. Kelley) –Preparing A=12 ENSDF file –Preparing A=3 ENSDF file(J. Purcell) –Preparing A=2 for Nuclear Data Sheets and ENSDF (K. Leung & H.R. Weller) Future: A=13 & 14 evaluations

Other Recent Evaluation Activities Updated near dripline nuclides in ENSDF – 6 B, 7 B, 14 F, 15 Ne, 18 Mg, 19 Mg, (heavy Be and C isotopes) Updated ENSDF Reaction Data sets –  : 14 Be, 14 B, 19 N, 20 N –  -n: 12 Be, 13 B, 14 Be, 14 B, 15 B, 16 C, 17 B, 17 C, 17 N, 18 C, 18 N, 19 B, 19 C, 19 N, 20 C, 20 N –  -p: 9 C, 11 Be, 13 O, 20 Mg –  : 9 C, 11 Be, 14 Be, 17 N, 18 N, 20 Na

XUNDL Compilation Activities eXperimental Unevaluated Nuclear Data Library –Up-to-date compiled structure data Library –New articles added within 1-2 months – Feedback loop between source and evaluator –Committed to A=2-20 since April 2009 –60-65 data sets/year (5-6/month) *Need to resolve future path after Balraj Singh retires

Other Compilation Activities Compilation of ground state decay &  -decay references and data Compilation of (p,X) and ( ,X) excitation functions TUNL Dissertations- –

TUNL Nuclear Data Website usage

Validation Refinement Discovery US Nuclear Data Program Key is to satisfy national interests and meet user needs Ideas &Data Science