Triton mass in u
Atomic & nuclearMeasured
= 3.015 500 715 97(10) u
- Value
- 3.015 500 715 97 u
- Standard uncertainty
- 1 × 10−10 u
- Relative uncertainty
- 3.3 × 10−11 (33 parts per trillion)
- Status
- Measured
- Symbol
- Source
- CODATA 2022 via NIST · NIST entry
Use in a calculation
# triton mass in u, CODATA 2022 (NIST)
triton_mass_in_u = 3.01550071597 # u, standard uncertainty 1e-10
# SciPy: scipy.constants.physical_constants['triton mass in u']What it is
The rest mass of the triton, the nucleus of tritium (one proton and two neutrons), in unified atomic mass units (daltons), where 1 u is one twelfth of the mass of a carbon-12 atom.
In other units
| Unit | Value | |
|---|---|---|
| CGS (g) | 5.007 356 751 22 × 10−24 | |
| MeV/c² MeV / c² | 2808.921 136 69 | |
| GeV/c² GeV / c² | 2.808 921 136 69 |
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 | 3.015 500 715 97(10) | 3.3 × 10−11 | −2.0 σ of 2018 |
| 2018 | 3.015 500 716 21(12) | 4.0 × 10−11 | −1.0 σ of 2014 |
| 2014 | 3.015 500 716 32(11) | 3.6 × 10−11 | +1.2 σ of 2010 |
| 2010 | 3.015 500 7134(25) | 8.3 × 10−10 | +0.0 σ of 2006 |
| 2006 | 3.015 500 7134(25) | 8.3 × 10−10 |
“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).