Physics
Freely Available Web Sites
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arXiv.org
arXiv is a preprint repository in physics, math, computer science and related disciplines enabling scientists worldwide to share and access research before it is formally published.
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Astrophysics Data System (ADS)
The SAO/NASA Astrophysics Data System (ADS) is a digital library portal for researchers in Astronomy and Physics, operated by the Smithsonian Astrophysical Observatory (SAO) under a NASA grant. The ADS maintains three bibliographic databases containing more than 10.9 million records covering publications in Astronomy and Astrophysics, Physics, and the arXiv e-prints. Abstracts and full-text of major astronomy and physics publications are indexed and searchable through the new ADS Labs interface as well as the traditional "Classic" search forms.
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National Nuclear Data CenterThe National Nuclear Data Center (NNDC) collects, evaluates, and disseminates nuclear physics data for basic nuclear research and for applied nuclear technologies. The NNDC is a worldwide resource for nuclear data.
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NIST Physical Reference DataRun by the National Institiute of Standards and Technology. Information available includes Physical Constants, Atomic Spectroscopy Data, Molecular Spectroscopy Data, and many others.
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INSPIREThe High Energy Physics Database, run by the Stanford Linear Accelerator Center. For help with searching, see the examples page.
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SciTech Connect
SciTech Connect is a portal to free, publicly-available DOE-sponsored R&D results including technical reports, bibliographic citations, journal articles, conference papers, books, multimedia and data information. SciTech Connect is a consolidation of two core DOE search engines, the Information Bridge and the Energy Citations Database. SciTech Connect incorporates all of the R&D information from these two products into one search interface.