Bohr magneton in K/T
ElectromagneticMeasured
= 0.671 713 814 72(21) K T−1
- Value
- 0.671 713 814 72 K T−1
- Standard uncertainty
- 2.1 × 10−10 K T−1
- Relative uncertainty
- 3.1 × 10−10 (313 parts per trillion)
- Status
- Measured
- Symbol
- Source
- CODATA 2022 via NIST · NIST entry
Use in a calculation
Plain
LaTeX
Python
# Bohr magneton in K/T, CODATA 2022 (NIST)
bohr_magneton_in_k_t = 6.7171381472e-1 # K T^-1, standard uncertainty 2.1e-10
# SciPy: scipy.constants.physical_constants['Bohr magneton in K/T']What it is
The Bohr magneton expressed in kelvins 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 | 0.671 713 814 72(21) | 3.1 × 10−10 | −4.5 σ of 2018 |
| 2018 | 0.671 713 815 63(20) | 3.0 × 10−10 | −0.6 σ of 2014 |
| 2014 | 0.671 714 05(39) | 5.8 × 10−7 | +0.3 σ of 2010 |
| 2010 | 0.671 713 88(61) | 9.1 × 10−7 | +0.7 σ of 2006 |
| 2006 | 0.671 7131(12) | 1.8 × 10−6 | +0.0 σ of 2002 |
| 2002 | 0.671 7131(12) | 1.8 × 10−6 | +0.0 σ of 1998 |
| 1998 | 0.671 7131(12) | 1.8 × 10−6 |
“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).