NIST Physical Measurement Laboratory Energy Levels of Hydrogen and Deuterium

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Version History

Example of how to reference this online database:
U.D. Jentschura, S. Kotochigova, E.O. LeBigot, P.J. Mohr, and B.N. Taylor (2005), The Energy Levels of Hydrogen and Deuterium (version 2.1). [Online] Available: http://physics.nist.gov/HDEL [Saturday, 20-Dec-2014 07:14:11 EST]. National Institute of Standards and Technology, Gaithersburg, MD.
Citation Form:
Author/editor (Year), Title (edition). [Type of medium] Available: URL [Access date].


Version 2.1
July 2005
Database code modified to use higher precision results from the least-squares adjustment. Eliminates a minor rounding error in the 1S - 2S frequency in hydrogen.
Version 2.0
April 2005
Surveys of the theory used in the database have been added with a new Web page describing the information in each specialized review. The theoretical formulation of the database, for states not included in the CODATA 2002 least-squares adjustment of the fundamental constants, has been improved to include the results of recent calculations.
Version 1.1
June 2004
Minor changes have been made to the text, error messages, data format, and graphical user interface.
Version 1.0
May 2004
Web database online.
Earlier Work:
March 2005
CODATA recommended values of the fundamental physical constants: 2002
Peter J. Mohr, Barry N. Taylor,
Rev. Mod. Phys. 77(1), 1-107 (2005)
2002 Precise energies of highly excited hydrogen and deuterium
Svetlana Kotochigova, Peter J. Mohr, and Barry N. Taylor
Can. J. Phys. 80 1373-1382 (2002)
April 2000 CODATA recommended values of the fundamental physical constants: 1998 Peter J. Mohr and Barry N. Taylor,
Rev. Mod. Phys. 72(2), 351-495 (2000)


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