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Atomic Spectra

Ionization Potential

Energy Level

Collisional Processes

Quantum Defect


Photon ionization


Ionization Potential



Please input the following information

or retrieve data from the data list.

Range of ionization energy:   from  to (eV)
Element:   or select from the
Isoelectroic sequence:  or select from the 
Reference ID:  


    There are about 2300 records up to date. The data came from the old version of the SPECTR database created in 1988-95 at Multicharged-Ion Spectra Data Center of State Research Center VNIIFTRI, Russia. The content in one record consists of element, isoelectronic sequence, notation of energy level, ionization energy (in unit of eV), method and reference for which the data are obtained. To retrieve ionization energy of an ion, one should input at least one of above items in the records. or retrieve data from the data list directly.

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