Bohr magneton in Hz/T
ElectromagneticMeasured
= 1.399 624 491 71(44) × 1010 Hz T−1
- Value
- 1.399 624 491 71 × 1010 Hz T−1
- Standard uncertainty
- 4.4 Hz T−1
- Relative uncertainty
- 3.1 × 10−10 (314 parts per trillion)
- Status
- Measured
- Symbol
- Source
- CODATA 2022 via NIST · NIST entry
Use in a calculation
Plain
LaTeX
Python
# Bohr magneton in Hz/T, CODATA 2022 (NIST)
bohr_magneton_in_hz_t = 1.39962449171e10 # Hz T^-1, standard uncertainty 4.4
# SciPy: scipy.constants.physical_constants['Bohr magneton in Hz/T']What it is
The Bohr magneton expressed in hertz 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 | 1.399 624 491 71(44) × 1010 | 3.1 × 10−10 | −4.5 σ of 2018 |
| 2018 | 1.399 624 493 61(42) × 1010 | 3.0 × 10−10 | −1.2 σ of 2014 |
| 2014 | 13.996 245 042(86) × 109 | 6.1 × 10−9 | −1.6 σ of 2010 |
| 2010 | 13.996 245 55(31) × 109 | 2.2 × 10−8 | −1.4 σ of 2006 |
| 2006 | 13.996 246 04(35) × 109 | 2.5 × 10−8 | +0.2 σ of 2002 |
| 2002 | 13.996 2458(12) × 109 | 8.6 × 10−8 | −0.8 σ of 1998 |
| 1998 | 13.996 246 24(56) × 109 | 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).