= Energy Levels of Neutral Oxygen by National Institute of Standards and Technology
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{tag=Work by National Institute of Standards and Technology}
By <National Institute of Standards and Technology>. Handbook of Basic Atomic Spectroscopic Data, neutral <oxygen> O I table.
https://physics.nist.gov/PhysRefData/Handbook/Tables/oxygentable5_a.htm
The first configuration block specifies $2s^22p^4\,{}^3P_2$ as the zero-energy level, followed by its $J=1,0$ fine-structure partners.
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