Triton mass energy equivalent
Atomic & nuclearMeasured
= 4.500 387 8119(14) × 10−10 J
- Value
- 4.500 387 8119 × 10−10 J
- Standard uncertainty
- 1.4 × 10−19 J
- Relative uncertainty
- 3.1 × 10−10 (311 parts per trillion)
- Status
- Measured
- Symbol
- Source
- CODATA 2022 via NIST · NIST entry
Use in a calculation
# triton mass energy equivalent, CODATA 2022 (NIST)
triton_mass_energy_equivalent = 4.5003878119e-10 # J, standard uncertainty 1.4e-19
# SciPy: scipy.constants.physical_constants['triton mass energy equivalent']What it is
The rest energy (mass × c²) of the triton, the nucleus of tritium (one proton and two neutrons), in joules.
In other units
| Unit | Value | |
|---|---|---|
| CGS (cm2 g s−2) | 0.004 500 387 8119 | |
| keV kiloelectronvolt | 2 808 921.1367 | |
| MeV megaelectronvolt | 2808.921 1367 | |
| GeV gigaelectronvolt | 2.808 921 1367 | |
| erg erg | 0.004 500 387 8119 |
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 | 4.500 387 8119(14) × 10−10 | 3.1 × 10−10 | +4.2 σ of 2018 |
| 2018 | 4.500 387 8060(14) × 10−10 | 3.1 × 10−10 | +1.3 σ of 2014 |
| 2014 | 4.500 387 735(55) × 10−10 | 1.2 × 10−8 | +1.6 σ of 2010 |
| 2010 | 4.500 387 41(20) × 10−10 | 4.4 × 10−8 | +1.7 σ of 2006 |
| 2006 | 4.500 387 03(22) × 10−10 | 4.9 × 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).