Recent Developments in NNDC Web Service Boris Pritychenko for

							    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.
                           *pritychenko@bnl.gov




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 ?
                                      151
• Example of                                Sm(n,g) reaction

Data Needs in Nuclear Astrophysics,
     Basel, June 23-25, 2006
                       Nuclear Science References
                         www.nndc.bnl.gov/nsr




Data Needs in Nuclear Astrophysics,
     Basel, June 23-25, 2006
                               Q-value Calculator
                             www.nndc.bnl.gov/qcalc




Data Needs in Nuclear Astrophysics,
     Basel, June 23-25, 2006
                           Chart of Nuclides
                         www.nndc.bnl.hov/chart




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
                                      15500 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
        (www.nndc.bnl.gov/endf2)
                                      The latest version of the
                                      library ENDF/B-VII beta2
                                      contains neutron cross
                                      sections for 393 isotopes
                                               -5
                                      from 10 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
                                                g            E )dE were
                                                  (E)E exp(data librarywith ENDF utility
                                            
                                                            processed
                    g  2 0                               kT INTER for data points
                                                            code-5
                                                        E in dE to 20 MeV energy
                                                 E exp(
                                                               10
                                                             )
                                                            range.
                                                 0          kT
Data Needs in Nuclear Astrophysics,
     Basel, June 23-25, 2006
                                             151
                        ENDF/B-VII beta2 &         Sm(n,g)


                                                   The calculated Maxwellian
                                                   average capture cross
                                                   section at 30 keV for
                                                   151
                                                       Sm(n,g) 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 (www.nndc.bnl.gov/atlas)
                                      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,g) 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




                                      g = 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


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