Deuteron Mass Energy

The deuteron's rest energy, 1875.613 MeV — the binding energy of the first nucleus forged.

Specifications & Metrics

symbol

mdc²

status

Measured — CODATA 2022 adjustment

value

1875.612945 ± 5.8 × 10⁻⁷ MeV

Relative Scale in Constants

Core Principles & Analysis

• Less than proton plus neutron by 2.224 MeV, the binding energy radiated in deuterium formation.
• That binding is the bottleneck step of primordial nucleosynthesis.
• Deuterium's abundance today still measures how hot the young universe was.