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Atomic Spectra

Ionization Potential

Energy Level

Collisional Processes

Quantum Defect


Photon ionization


Atomic Spectra 


Introduction >>

Please input the following information:

or retrieve data from the data list.

Element: ¡¡    (e.g. H)
Isoelectroic sequence(I.S.): ¡¡    (e.g. H)
Range of Wavelength:


from to (Å).
Optical electron: ¡¡ (e.g. 15p-2s)
Reference ID: ¡¡
Method for data: ¡¡   EXP THR COMP   SEMP
Display Order: ¡¡  Element I.S. Wavelength
Display style: ¡¡

brief   detail 


    There are six items for selection or input. One can retrieve the needed spectra data by specifying all of or at least one of the four items: element,isoelectronic sequence,range of wavelength and optical electron. If no selection is made for each item (e.g. element), all data (e.g. of all elements) will be retrieved. Example: if to select all spectra data of H-like He in the range of wavelength 4444-5555(Å), please
1. input or select the ¡°He¡± for the element item.
2. input or select the ¡°H¡± for the isoelectronic sequence item.
3. input from ¡°4444¡± to ¡°5555¡± Å for the wavelength item.
4. select one of or all of data types: EXP (experimental data), THR (theoretical data), COMP (compiled data), SEMP (semi-empirical data).
5. choose the display order by element, isoelectronic sequence (I.S.) or wavelength.
6. choose the display style: in brief or in detail.

or retrieve data from the data list directly.


Introduction:      ¡¾More information¡¿
    The atomic spectra database contains more than 2 millions lines and Part data came from the old version of the SPECTR database created by Multicharged-Ion Spectra Data Center of State Research Center VNIIFTRI in Russia. Many people contributed a lot to the database for many years. Therefore the configuration and energy levels of some lines may not be labeled in a unified criterion. The standardization is in progress.


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