Atomic Database

Ionization potentials



Electron-impact excitation

Electron-impact ionization

Dielectronic recombination


Photon ionization

Heavy particle collision



Quantum defect

Or select atomic data from the periodic table. 

Index of atomic spectra, Ionization potentials and levels


   Please contact us if you have any comment, suggestion and recommended data.  E-mail to us

Molecular  Database

Ion-molecular Collision

Background knowledge

Electron-molecular Collision    [Background]

Molecular Spectra


  Introduction Welcome to our Atomic & Molecular Database in the Institute of Applied Physics and Computational Mathematics (IAPCM). The database is intended to collect , assess and compile atomic and molecular data for various elementary processes, and especially data needed in plasma simulation and diagnosis. Part data came from the old version of the SPECTR database(by A.Ya Faenov et al). So far the database consists of more than 2 millions records of atomic and molecular  data. The molecular database is under construction. More information.

NEWS: Fe-LIKE and Co-LIKE spectra data are updated.


  BE-LIKE and C-LIKE spectra data are updated.

2016-9-20 - 09:45:42

 happy new year!

2006-1-1 - 21:17:19

  new added Electron-impact excitation data of F-like.

2005-12-19 - 22:01:52


2005-07-15- 17:47:49

  new added spectra data of Ne-like and Ni-like ions.

2005-04-07 - 17:46:49

new added level data of Ne-like and Ni-like ions.

2005-04-07 - 17:45:06


2004-12-17 - 14:46:29

Supported by:

Institute of Applied Physics and Computational Mathematics

Chinese National Committee for CODATA.


Periodic Table of Elements Physical Constants

  NIST PRD Databases
  Opacity Project Database, Strasbourg, France
  GAPHYOR Data Center, Orsay, France
  AMDIS IAEA, Vienna, Austria
  NIFS Database, Japan
  SPECTR-W3, RFNC VNIITF, Snezhinsk, Russia

Latest update:12/31/2018; Now on line: 4. Count: Total 16480.
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