Triton mass energy equivalent in MeV
Atomic & nuclearMeasured
= 2808.921 136 68(88) MeV
- Value
- 2808.921 136 68 MeV
- Standard uncertainty
- 8.8 × 10−7 MeV
- Relative uncertainty
- 3.1 × 10−10 (313 parts per trillion)
- Status
- Measured
- Symbol
- Source
- CODATA 2022 via NIST · NIST entry
Use in a calculation
# triton mass energy equivalent in MeV, CODATA 2022 (NIST)
triton_mass_energy_equivalent_in_mev = 2.80892113668e3 # MeV, standard uncertainty 8.8e-7
# SciPy: scipy.constants.physical_constants['triton mass energy equivalent in MeV']What it is
The rest energy (mass × c²) of the triton, the nucleus of tritium (one proton and two neutrons), in mega-electronvolts, the unit particle physicists use.
In other units
| Unit | Value | |
|---|---|---|
| CGS (cm2 g s−2) | 0.004 500 387 811 94 | |
| keV kiloelectronvolt | 2 808 921.136 68 | |
| GeV gigaelectronvolt | 2.808 921 136 68 | |
| erg erg | 0.004 500 387 811 94 |
Converted with ConstantID's unit table; digits are rounded to the precision of the value, and a long exact value is rounded only for display. The relative uncertainty is unchanged by conversion to an exactly defined unit.
How the value changed, 1998–2022
Each point is one CODATA adjustment, plotted as its difference from the 2022 value; the bars show one standard uncertainty (an arrowhead means the bar runs off the chart).
Relative uncertainty
| CODATA | Value (uncertainty) | Relative uncertainty | Change from previous |
|---|---|---|---|
| 2022 | 2808.921 136 68(88) | 3.1 × 10−10 | +4.4 σ of 2018 |
| 2018 | 2808.921 132 98(85) | 3.0 × 10−10 | +1.2 σ of 2014 |
| 2014 | 2808.921 112(17) | 6.1 × 10−9 | +1.7 σ of 2010 |
| 2010 | 2808.921 005(62) | 2.2 × 10−8 | +1.4 σ of 2006 |
| 2006 | 2808.920 906(70) | 2.5 × 10−8 |
“Change from previous” is the shift in the value divided by the standard uncertainty of the previous adjustment. Earlier values are converted into the current unit where NIST changed it (for example J s to J Hz⁻¹).