 |
 |
 |
- 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 [2025, February 16]. 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) |
