NNDC Data Services

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NNDC Data Services
NNDC Data Services
NNDC Data Services

• Jagdish K. Tuli
• National Nuclear Data Center
• Brookhaven National Laboratory
• Upton, NY 11973

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Overview of US Nuclear Data Programs nuclear
structure and decay data activities

• Content
• How do our evaluation and dissemination
  activities fit into the global picture?
• Who is involved?
• What are the major products?
• How can our products be accessed?
• Other activities

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USNDP Evaluators Who Are We?

• US Network (6 FTE)
• (US-DOE Office of Science funded)

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NNDC Web Portal
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Geographical Distribution of NNDC Users in 2004

• USA - 41.87
• EU - 25.72
• Japan - 6.06
• China - 3.75
• Former USSR - 3.28
• India - 3.13
• Canada - 2.47
• Korea - 1.09
• Australia - 0.78
• Brazil - 0.77
• The rest- 4.14

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Our Major Products
Evaluated (or compiled) structure decay data,
A1-294, and the means to access them

• PRINCIPAL DATABASES .
• Web accessible from NNDC or mirror sites
  http//www.nndc.bnl.gov.
• NSR - Nuclear Science References (bibliographic).
• ENSDF - Evaluated Nuclear Structure Data File
  comprehensive, peer reviewed, publicly available
  the primary data source for other special
  purpose databases and the starting point for
  several major publications.
• XUNDL Experimental Unevaluated Data List
  compiled from recently published literature
  primarily high-J papers.

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Nuclear Structure Data

• Bibliographic data
• Evaluated data
• Journal prepn

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Electronic Access to Nuclear Data

• Electronic access to nuclear physics data bases,
  computer codes and documents available since
  1986.

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2004 Web Statistics

• Portal was launched on April 19, 2004
• Number of retrievals went from 338K in 2003 to
  560K in 2004, 66 calendar year increase
• Number of database retrievals increased
  two-folds with a new portal
• Migration User Interface
• improvements produce results