Grotrian diagram

Grotrian diagram

A Grotrian diagram or term diagram shows the allowed transitions between the energy levels of atoms. They can be used for one electron and multi electron atoms. They take into account the specific selection rules related to changes in angular momentum of the electron.

Graphical representation [http://spider.ipac.caltech.edu/staff/rosalie/H.jpghere:]

The diagrams are named after Walter Grotrian.


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