## Wikipedia - هارتري Hartree energy

https://doi.org/10.1351/goldbook.H02748
Atomic fundamental physical constant used as @A00504@ of energy: $$E_{\text{h}}=\frac{\mathrm{\hslash }^{2}}{m_{\text{e}}\ a_{0}^{2}} = 4.359\ 7482(26)\times 10^{-18}\ \text{J}$$, where $$\mathrm{\hslash}$$ is the @P04685@ divided by $$2\ \pi$$, $$m_{\text{e}}$$ the @E02008@ and $$a_{0}$$ the @B00693@.
Source:
CODATA Bull. 1986, 63, 1 [Terms] [Book]