Hartree energy
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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 absolute value of binding energy of the electron in the ground state of the hydrogen atom |W1| or the ionization energy.
- <math>E_h = {\hbar^2 \over {m_e a^2_0}}<math>
where:
- <math>\hbar<math> is the Planck's constant,
- <math>m_e<math> is the electron rest mass
- <math>a_0<math> is the Bohr radiusde:Hartree-Energie