Proton magnetic shielding correction = 2.567 15 × 10−5 (dimensionless)

Value
2.567 15 × 10−5
Unit
(dimensionless)
Uncertainty
0.000 41 × 10⁻⁵
Copy-ready
2.56715e-5

The fractional shift between a free proton's magnetic moment and a proton's in a spherical water sample.

The correction that turns a water-probe NMR reading into a free-proton field value.

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

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All physical constants

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