Helion Mass Energy

The rest energy of the helium-3 nucleus, 2808.39 MeV — a neutron-rich tracer of cosmic history.

Specifications & Metrics

symbol

mh²⁺c²

status

Measured — CODATA 2022 adjustment

value

2808.39161112 ± 8.8 × 10⁻⁷ MeV

Relative Scale in Constants

Core Principles & Analysis

• Helion is helium-3's bare nucleus: two protons, one neutron.
• Sought as clean fusion fuel in the D–³He reaction.
• Its small charge makes it a probe of nuclear structure by spectroscopy.