Data Needs in Nuclear Astrophysics, Basel, June 23-25, 2006 Nuclear Astrophysics Resources of the National Nuclear Data Center B. Pritychenko*, M.W. Herman,

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Presentation transcript:

Data Needs in Nuclear Astrophysics, Basel, June 23-25, 2006 Nuclear Astrophysics Resources of the National Nuclear Data Center B. Pritychenko*, M.W. Herman, S.F. Mughabghab, P. Oblozinsky, A.A. Sonzogni National Nuclear Data Center, Brookhaven National Laboratory, Upton, U.S.A. Nuclear Astrophysics Resources of the National Nuclear Data Center B. Pritychenko*, M.W. Herman, S.F. Mughabghab, P. Oblozinsky, A.A. Sonzogni National Nuclear Data Center, Brookhaven National Laboratory, Upton, U.S.A.

Data Needs in Nuclear Astrophysics, Basel, June 23-25, 2006 NNDC Web Services

Data Needs in Nuclear Astrophysics, Basel, June 23-25, 2006 NNDC Computer Network

Data Needs in Nuclear Astrophysics, Basel, June 23-25, 2006 Nuclear Astrophysics Motivation NNDC is a leading provider of Nuclear Data Web services NNDC produces nuclear data, publications and codes Why not to apply NNDC nuclear data resources for nuclear astrophysics ? Example of 151 Sm(n,  ) reaction

Data Needs in Nuclear Astrophysics, Basel, June 23-25, 2006 Nuclear Science References

Data Needs in Nuclear Astrophysics, Basel, June 23-25, 2006 Q-value Calculator

Data Needs in Nuclear Astrophysics, Basel, June 23-25, 2006 Chart of Nuclides

Data Needs in Nuclear Astrophysics, Basel, June 23-25, 2006 Experimental Nuclear Reaction Data CSISRS, alias EXFOR data library contains experimental nuclear reaction data for incident neutrons, charged particles, and photons. It includes more than experiments and covers nearly all of neutron-induced reaction experimental data up to the pion threshold.

Data Needs in Nuclear Astrophysics, Basel, June 23-25, 2006 Evaluated Nuclear (reaction) Data File ( The latest version of the library ENDF/B-VII beta2 contains neutron cross sections for 393 isotopes from eV to 20 MeV: 8 nuclear data standards, 20 thermal scattering, 48 proton, 163 photo-nuclear, 3830 decay and 10 charged-particle files. The final version of ENDF/B-VII library and a new Web application will be released in 2006.

Data Needs in Nuclear Astrophysics, Basel, June 23-25, 2006 ENDF/B-VII beta2 Nuclear astrophysics s-process calculations require Maxwellian average neutron capture cross sections. Evaluated neutron capture cross sections for the entire ENDF/B-VII beta2 nuclear data library were processed with ENDF utility code INTER for data points in to 20 MeV energy range.

Data Needs in Nuclear Astrophysics, Basel, June 23-25, 2006 ENDF/B-VII beta2 & 151 Sm(n,  ) The calculated Maxwellian average capture cross section at 30 keV for 151 Sm(n,  ) reaction is 3045 mb, which is in excellent agreement with 3031(82) mb and 3100(160) mb measured by Wisshak et al. [6] and Abbondanno et al. [7], respectively.

Data Needs in Nuclear Astrophysics, Basel, June 23-25, 2006 Atlas of Neutron Resonances I Atlas of Neutron Resonances reference book ( represents the neutron data for 98 elements and 486 ground and isomeric states of 476 isotopes (381 isotopes with resonance data).

Data Needs in Nuclear Astrophysics, Basel, June 23-25, 2006 Atlas of neutron Resonances II It includes evaluated (n,  ) cross sections for 186 isotopes at 30 keV. Data are shown as a function of neutron number N of s-process nuclei. Cross section values plunge near the neutron closed shells at N = 20,28,50,82, and 126.

Data Needs in Nuclear Astrophysics, Basel, June 23-25, 2006 Atlas of Neutron Resonances III  = 3100(160) mb

Data Needs in Nuclear Astrophysics, Basel, June 23-25, 2006 Conclusion & Outlook NNDC has been in business for more than 50 years NNDC has computer/Web/nuclear data expertise NNDC will continue to provide data for nuclear astrophysics community NNDC is a cost-free Web platform for nuclear astrophysics applications