Nuclear magneton in MHz/T

$μ_N/h$ = 7.622 593 2188(24) MHz T⁻¹

Value: 7.622 593 2188 MHz T⁻¹
Standard uncertainty: 2.4 × 10⁻⁹ MHz T⁻¹
Relative uncertainty: 3.1 × 10⁻¹⁰ (315 parts per trillion)
Status: Measured
Symbol: $μ_N/h$
Source: CODATA 2022 via NIST · NIST entry

Use in a calculation

# nuclear magneton in MHz/T, CODATA 2022 (NIST)
nuclear_magneton_in_mhz_t = 7.6225932188  # MHz T^-1, standard uncertainty 2.4e-9

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

What it is

The nuclear magneton expressed in megahertz 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	7.622 593 2188(24)	3.1 × 10⁻¹⁰	−4.5 σ of 2018
2018	7.622 593 2291(23)	3.0 × 10⁻¹⁰	−1.2 σ of 2014
2014	7.622 593 285(47)	6.2 × 10⁻⁹	−1.7 σ of 2010
2010	7.622 593 57(17)	2.2 × 10⁻⁸	−1.4 σ of 2006
2006	7.622 593 84(19)	2.5 × 10⁻⁸	+0.2 σ of 2002
2002	7.622 593 71(65)	8.5 × 10⁻⁸	−0.8 σ of 1998
1998	7.622 593 96(31)	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).

Related constants

Electromagnetic

μ_N

Nuclear magneton 5.050 783 7393(16) × 10⁻²⁷ J T⁻¹ Electromagnetic

μ_N

Nuclear magneton in eV/T 3.152 451 254 17(98) × 10⁻⁸ eV T⁻¹ Electromagnetic

μ_N/hc

Nuclear magneton in inverse meter per tesla 2.542 623 410 09(79) × 10⁻² m⁻¹ T⁻¹ Electromagnetic

μ_N/k

Nuclear magneton in K/T 3.658 267 7706(11) × 10⁻⁴ K T⁻¹