Deuteron mass energy equivalent in MeV
Atomic & nuclearMeasured
= 1875.612 945 00(58) MeV
- Value
- 1875.612 945 00 MeV
- Standard uncertainty
- 5.8 × 10−7 MeV
- Relative uncertainty
- 3.1 × 10−10 (309 parts per trillion)
- Status
- Measured
- Symbol
- Source
- CODATA 2022 via NIST · NIST entry
Use in a calculation
# deuteron mass energy equivalent in MeV, CODATA 2022 (NIST)
deuteron_mass_energy_equivalent_in_mev = 1.875612945e3 # MeV, standard uncertainty 5.8e-7
# SciPy: scipy.constants.physical_constants['deuteron mass energy equivalent in MeV']What it is
The rest energy (mass × c²) of the deuteron, the nucleus of deuterium (one proton and one neutron), in mega-electronvolts, the unit particle physicists use.
In other units
| Unit | Value | |
|---|---|---|
| CGS (cm2 g s−2) | 0.003 005 063 234 91 | |
| keV kiloelectronvolt | 1 875 612.945 | |
| GeV gigaelectronvolt | 1.875 612 945 | |
| erg erg | 0.003 005 063 234 91 |
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 | 1875.612 945 00(58) | 3.1 × 10−10 | +4.3 σ of 2018 |
| 2018 | 1875.612 942 57(57) | 3.0 × 10−10 | +1.2 σ of 2014 |
| 2014 | 1875.612 928(12) | 6.4 × 10−9 | +1.7 σ of 2010 |
| 2010 | 1875.612 859(41) | 2.2 × 10−8 | +1.4 σ of 2006 |
| 2006 | 1875.612 793(47) | 2.5 × 10−8 | −0.2 σ of 2002 |
| 2002 | 1875.612 82(16) | 8.5 × 10−8 | +0.8 σ of 1998 |
| 1998 | 1875.612 762(75) | 4.0 × 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).