The neutron's gyromagnetic ratio is γ n = −1.832 471 74 (43) × 10 s ⋅T. ‍ The proton's gyromagnetic ratio is γ p = 2.675 221 8708 (11) × 10 s ⋅T. ‍ The gyromagnetic ratio is also the ratio between the observed angular frequency of Larmor precession and the strength of the magnetic field in nuclear magnetic resonance applications, such as in MRI imaging. For this reason, the quantity γ /2 π called "gamma bar", expressed in the unit MHz / T, is often given. The quantities γ n /⁠2 π = −29.164 6935 (69) MHz⋅T ‍ and γ p /⁠2 π = 42.577 478 461 (18) MHz⋅T, ‍ are therefore convenient.