Triton mass
Atomic & nuclearMeasured
= 5.007 356 7512(16) × 10−27 kg
- Value
- 5.007 356 7512 × 10−27 kg
- Standard uncertainty
- 1.6 × 10−36 kg
- Relative uncertainty
- 3.2 × 10−10 (320 parts per trillion)
- Status
- Measured
- Symbol
- Source
- CODATA 2022 via NIST · NIST entry
Use in a calculation
# triton mass, CODATA 2022 (NIST)
triton_mass = 5.0073567512e-27 # kg, standard uncertainty 1.6e-36
# SciPy: scipy.constants.physical_constants['triton mass']What it is
The rest mass of the triton, the nucleus of tritium (one proton and two neutrons), in kilograms.
In other units
| Unit | Value | |
|---|---|---|
| CGS (g) | 5.007 356 7512 × 10−24 | |
| u dalton / atomic mass unit | 3.015 500 716 | unit is itself measured |
| MeV/c² MeV / c² | 2808.921 1367 | |
| GeV/c² GeV / c² | 2.808 921 1367 |
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 | 5.007 356 7512(16) × 10−27 | 3.2 × 10−10 | +4.4 σ of 2018 |
| 2018 | 5.007 356 7446(15) × 10−27 | 3.0 × 10−10 | +1.3 σ of 2014 |
| 2014 | 5.007 356 665(62) × 10−27 | 1.2 × 10−8 | +1.7 σ of 2010 |
| 2010 | 5.007 356 30(22) × 10−27 | 4.4 × 10−8 | +1.7 σ of 2006 |
| 2006 | 5.007 355 88(25) × 10−27 | 5.0 × 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).