Atomic unit of electric field
UnitsMeasured
= 5.142 206 751 12(80) × 1011 V m−1
- Value
- 5.142 206 751 12 × 1011 V m−1
- Standard uncertainty
- 80 V m−1
- Relative uncertainty
- 1.6 × 10−10 (156 parts per trillion)
- Status
- Measured
- Symbol
- Source
- CODATA 2022 via NIST · NIST entry
Use in a calculation
Plain
LaTeX
Python
# atomic unit of electric field, CODATA 2022 (NIST)
atomic_unit_of_electric_field = 5.14220675112e11 # V m^-1, standard uncertainty 80
# SciPy: scipy.constants.physical_constants['atomic unit of electric field']What it is
The unit of electric field in the Hartree system of atomic units, where the electron mass, the elementary charge, ħ and 4πε₀ are all set to 1. Its value here is the SI equivalent of one atomic 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 | 5.142 206 751 12(80) × 1011 | 1.6 × 10−10 | +4.5 σ of 2018 |
| 2018 | 5.142 206 747 63(78) × 1011 | 1.5 × 10−10 | +1.3 σ of 2014 |
| 2014 | 5.142 206 707(32) × 1011 | 6.2 × 10−9 | +1.7 σ of 2010 |
| 2010 | 5.142 206 52(11) × 1011 | 2.1 × 10−8 | +1.5 σ of 2006 |
| 2006 | 5.142 206 32(13) × 1011 | 2.5 × 10−8 | −0.2 σ of 2002 |
| 2002 | 5.142 206 42(44) × 1011 | 8.6 × 10−8 | +0.9 σ of 1998 |
| 1998 | 5.142 206 24(20) × 1011 | 3.9 × 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).