ConstantID

Nuclear magneton in K/T

ElectromagneticMeasured

μN/k = 3.658 267 7706(11) × 10−4 K T−1

Value
3.658 267 7706 × 10−4 K T−1
Standard uncertainty
1.1 × 10−13 K T−1
Relative uncertainty
3.0 × 10−10 (301 parts per trillion)
Status
Measured
Symbol
μN/k
Source
CODATA 2022 via NIST · NIST entry

Use in a calculation

# nuclear magneton in K/T, CODATA 2022 (NIST)
nuclear_magneton_in_k_t = 3.6582677706e-4  # K T^-1, standard uncertainty 1.1e-13

# SciPy: scipy.constants.physical_constants['nuclear magneton in K/T']

What it is

The nuclear 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).

nuclear magneton in K/T: CODATA values 1998–2022 relative to the 2022 value, in parts per billion, with one-standard-uncertainty bars−2000−10000+1000+2000parts per billion1998200220062010201420182022

Relative uncertainty

nuclear magneton in K/T: relative standard uncertainty in each CODATA adjustment, logarithmic scale10⁻¹⁰10⁻⁹10⁻⁸10⁻⁷10⁻⁶10⁻⁵1998200220062010201420182022
CODATAValue (uncertainty)Relative uncertaintyChange from previous
20223.658 267 7706(11) × 10−43.0 × 10−10 −4.5 σ of 2018
20183.658 267 7756(11) × 10−43.0 × 10−10 −0.6 σ of 2014
20143.658 2690(21) × 10−45.7 × 10−7 +0.2 σ of 2010
20103.658 2682(33) × 10−49.0 × 10−7 +0.7 σ of 2006
20063.658 2637(64) × 10−41.7 × 10−6 +0.0 σ of 2002
20023.658 2637(64) × 10−41.7 × 10−6 −0.0 σ of 1998
19983.658 2638(64) × 10−41.7 × 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).

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