Physical Reference Data

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Version 3

Welcome to the NIST Atomic Spectra Database, NIST Standard Reference Database #78. The spectroscopic data may be selected and displayed according to wavelengths or energy levels by choosing one of the following options:

Click on image to access lines form   Spectral lines and associated energy levels displayed in wavelength order with all selected spectra intermixed or in multiplet order. Transition probabilities for the lines are also displayed where available.
 
Click on image to access levels form   Energy levels of a particular atom or ion displayed in order of energy above the ground state.
Additional information about the database may be obtained through the following links:

Introduction   Introduction to the Atomic Spectra Database.
List of Spectra   Overview of data contained in the database.
Ground States and
Ionization Energies		   Table of Ground States and Ionization Energies for Neutral Atoms.
Bibliography   Bibliography of data sources used for this database.
Help   On-line help in using the database.
This database provides access and search capability for NIST critically evaluated data on atomic energy levels, wavelengths, and transition probabilities that are reasonably up-to-date. The Atomic Energy Levels Data Center and Data Center on Atomic Transition Probabilities and Line Shapes have carried out these critical compilations. Both Data Centers are located in the Physics Laboratory at the National Institute of Standards and Technology (NIST).

NIST ASD Team

Principal Developers (Currently Active):
Yu. Ralchenko,1 A.E. Kramida,1 and J. Reader1

Data Compilers (Currently Active):
   Atomic Energy Levels and Wavelengths:
A.E.Kramida,1 E.B. Saloman,1 J.E. Sansonetti,1 and J.J. Curry1

   Atomic Transition Probabilities:
D.E. Kelleher,1 A.E.Kramida,1 J.R. Fuhr,1 L. Podobedova,1 and W.L. Wiese1

Database Developers (Currently Active):
   Database Management:
Yu. Ralchenko,1 A.E. Kramida,1 and K. Olsen2

   World Wide Web Interface:
Yu. Ralchenko1

Past Contributors:
G.R. Dalton,3 R. Dragoset,2 F.-C. Jou,1 W.C. Martin ,1 P.J. Mohr,1 A. Musgrove,1 C.J. Sansonetti,1 and G. Wiersma2

1Atomic Physics Division,  2Office of Electronic Commerce in Scientific and Engineering Data,  3Standard Reference Data Program

©1979, 1980, 1981, 1982, 1983, 1985, 1988, 1990, 1991, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2005, 2006, 2007, 2008
copyright by the U.S. Department of Commerce on behalf of the United States. All rights reserved.
NIST reserves the right to charge for these data in the future.
Other NIST Atomic Spectroscopic Data:
Handbook of Basic Atomic Spectroscopic Data
Energy Levels of of Hydrogen and Deuterium
Ground Levels and Ionization Energies for the Neutral Atoms
Spectral Data for the Chandra X-ray Observatory
Spectrum of Platinum Lamp for Ultraviolet Spectrograph Calibration
X-ray Transition Energies
Bibliographic Database on Atomic Transition Probabilities
Atomic Spectral Line Broadening Bibliographic Database
Atomic Energy Levels and Spectra Bibliographic Database
    Status of Atomic Spectroscopic  Data
This database was funded [in part] by the Office of Fusion Energy Sciences of the U.S. Department of Energy, by the National Aeronautics and Space Administration, by NIST's Standard Reference Data Program (SRDP), and by NIST's Systems Integration for Manufacturing Applications (SIMA) Program.

NIST: National Institute of Standards and TechnologyNIST Physics Laboratory HomePhysical Reference Data NIST Standard Reference Database 78
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Online: March 1995   -   Last update: April 2008