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. 0.75 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

ScienceIdeas &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 Datamerges 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 USNDPEvaluation: 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 IsotopesRIPL, Medical Internal Radiation Dose Program,MCNP, GEANT4, CINDER90, etc…

Experiment: Basic Science, Horizontal studies, Data for validation studies.

TUNL data group website

TUNL Evaluation ActivitiesWe 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, T1/2, , Q, configurations)Gammas:(Eg, BR, M,, ICC)

Decays-

++

-netc.

Reactions(HI,xn)(p,p’)

(n, ), (n,xng)Coul. Exc.

(,’), (a,xng)(d,p), etc.

ENSDF

www.nndc.bnl.gov/ensdf

Evaluated Nuclear Structure Data FileENSDF 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

ENSDFApplications

ENDF, JEFF, JENDL …

Simulations

Basic NP Research

RNALPGAANuDat astrophysics

IE

No viable alternative exists in the world!

USNDP evaluators International evaluators

Present Evaluation ActivitiesPublished “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

– 6B, 7B, 14F, 15Ne, 18Mg, 19Mg, (heavy Be and C isotopes)

• Updated ENSDF Reaction Data sets– b: 14Be, 14B, 19N, 20N– b-n: 12Be, 13B, 14Be, 14B, 15B, 16C, 17B, 17C, 17N, 18C, 18N,

19B, 19C, 19N, 20C, 20N– b-p: 9C, 11Be, 13O, 20Mg– -b a: 9C, 11Be, 14Be, 17N, 18N, 20Na

XUNDLCompilation 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 & b-decay references and data

• Compilation of (p,X) and (a,X) excitation functions

• TUNL Dissertations-– http://www.tunl.duke.edu/nucldata/Theses/TUNL_Theses.shtml

http://www.tunl.duke.edu/NuclData/

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