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Recent developments in the NIST Atomic Databases



Alexander Kramida


New versions of the NIST Atomic Spectra Database (ASD, v. 4.0) and three bibliographic databases (Atomic Energy Levels and Spectra, v. 2.0, Atomic Transition Probabilities, v. 9.0, and Atomic Line Broadening and Shapes, v. 3.0) have recently been released. In this contribution I will describe the main changes in the way users get the data through the Web. The contents of ASD have been significantly extended. In particular, the data on highly ionized tungsten (W III–LXXIV) have been added from a recently published NIST compilation. The tables for Fe I and Fe II have been replaced with newer, much more extensive lists (10000 lines for Fe I). The other updated or new spectra include H, D, T, He I–II, Li I–III, Be I–IV, B I–V, C I–II, N I–II, O I–II, Na I–X, K I–XIX, and Hg I. The new version of ASD now incorporates data on isotopes of several elements. I will describe some of the issues the NIST ASD Team faces when updating the data.
AIP Conference Proceedings


atomic databases, atomic data, energy levels, spectral lines, transition probabilities, data compilations


Kramida, A. (2011), Recent developments in the NIST Atomic Databases, AIP Conference Proceedings, [online], (Accessed May 30, 2024)


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Created May 11, 2011, Updated July 18, 2023