Neutron mass
kg
The neutron mass is the rest mass of a single neutron — very slightly heavier than a proton, which is why free neutrons decay into protons. Together with the proton mass it sets the scale of all nuclear masses.
Used in
- Nuclear binding energy calculations
- Neutron decay: n → p + e⁻ + anti-ν_e
Source: SI defining constants / CODATA 2018