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Hartree energy
The Hartree energy (symbol Eh) is a physical constant used as atomic unit of energy, named after physicist Douglas Hartree[?].
It has a value of twice the binding energy of the electron in the ground state of the hydrogen atom.
- <math>E_h = {\hbar^2 \over {m_e a^2_0}}</math>
- = 4.359 743 81(34) x 10-18J
where:
- <math>\hbar</math> is the Dirac's constant,
- <math>m_e</math> is the electron rest mass
- <math>a_0</math> is the Bohr radius
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