Hartree atomic units

The Hartree atomic units are a system of natural units of measurement which is especially convenient for atomic physics and computational chemistry calculations. They are named after the physicist Douglas Hartree. In this system the numerical values of the following four fundamental physical constants are all unity by definition: * Reduced Planck constant: , also known as the atomic unit of action * Elementary charge: , also known as the atomic unit of charge * Bohr radius: , also known as the atomic unit of length * Electron mass: , also known as the atomic unit of mass

Hartree atomic units

The Hartree atomic units are a system of natural units of measurement which is especially convenient for atomic physics and computational chemistry calculations. They are named after the physicist Douglas Hartree. In this system the numerical values of the following four fundamental physical constants are all unity by definition: * Reduced Planck constant: , also known as the atomic unit of action * Elementary charge: , also known as the atomic unit of charge * Bohr radius: , also known as the atomic unit of length * Electron mass: , also known as the atomic unit of mass