Muon magnetic moment = -4.490 448 30 × 10−26 J·T⁻¹
- Value
- -4.490 448 30 × 10−26
- Unit
- J·T⁻¹
- Uncertainty
- 0.000 000 10 × 10⁻²⁶
- Copy-ready
-4.49044830e-26
Magnetic dipole moment of the muon — the electron's heavier, unstable cousin, made in vast numbers when cosmic rays hit the upper atmosphere.
Sets how strongly the particle lines up in a magnetic field — the quantity behind NMR, MRI and precision spectroscopy. A negative sign means the moment points opposite to the spin. Its ratios to the Bohr and nuclear magnetons and to other particles' moments are listed beneath.
The same quantity, other ways NIST lists it
| Quantity (NIST name) | Value | Unit | Uncertainty |
|---|---|---|---|
| Muon magnetic moment to Bohr magneton ratio | -4.841 970 48 × 10−3 | (dimensionless) | 0.000 000 11 × 10⁻³ |
| Muon magnetic moment to nuclear magneton ratio | -8.890 597 04 | (dimensionless) | 0.000 000 20 |
| Muon-proton magnetic moment ratio | -3.183 345 146 | (dimensionless) | 0.000 000 071 |
NIST, Fundamental Physical Constants — Complete Listing (2022 CODATA adjustment), retrieved 2026-07-26.
Magnetic moments, g-factors and gyromagnetic ratios
Deuteron magnetic momentElectron magnetic momentElectron g factorElectron gyromagnetic ratioElectron magnetic moment anomalyHelion g factorHelion magnetic momentHelion shielding shiftMuon g factorMuon magnetic momentMuon magnetic moment anomalyNeutron magnetic momentNeutron g factorNeutron gyromagnetic ratioProton g factorProton gyromagnetic ratioProton magnetic momentProton magnetic shielding correctionShielded helion gyromagnetic ratioShielded helion magnetic momentShielded proton gyromagnetic ratioShielded proton magnetic momentShielding difference of d and p in HDShielding difference of t and p in HTTriton g factorTriton magnetic moment