Bohr magneton in inverse meter per tesla
ElectromagneticMeasured
= 46.686 447 719(15) m−1 T−1
- Value
- 46.686 447 719 m−1 T−1
- Standard uncertainty
- 1.5 × 10−8 m−1 T−1
- Relative uncertainty
- 3.2 × 10−10 (321 parts per trillion)
- Status
- Measured
- Symbol
- Source
- CODATA 2022 via NIST · NIST entry
Use in a calculation
Plain
LaTeX
Python
# Bohr magneton in inverse meter per tesla, CODATA 2022 (NIST)
bohr_magneton_in_inverse_meter_per_tesla = 4.6686447719e1 # m^-1 T^-1, standard uncertainty 1.5e-8
# SciPy: scipy.constants.physical_constants['Bohr magneton in inverse meter per tesla']What it is
The Bohr magneton expressed in inverse metres per tesla.
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 | 46.686 447 719(15) | 3.2 × 10−10 | −4.6 σ of 2018 |
| 2018 | 46.686 447 783(14) | 3.0 × 10−10 | −1.2 σ of 2014 |
| 2014 | 46.686 448 14(29) | 6.2 × 10−9 | −1.7 σ of 2010 |
| 2010 | 46.686 4498(10) | 2.1 × 10−8 | −1.4 σ of 2006 |
| 2006 | 46.686 4515(12) | 2.6 × 10−8 | +0.2 σ of 2002 |
| 2002 | 46.686 4507(40) | 8.6 × 10−8 | −0.7 σ of 1998 |
| 1998 | 46.686 4521(19) | 4.1 × 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).