What is Gyromagnetic ratio: Definition and 11 Discussions

In physics, the gyromagnetic ratio (also sometimes known as the magnetogyric ratio in other disciplines) of a particle or system is the ratio of its magnetic moment to its angular momentum, and it is often denoted by the symbol γ, gamma. Its SI unit is the radian per second per tesla (rad⋅s−1⋅T−1) or, equivalently, the coulomb per kilogram (C⋅kg−1).
The term "gyromagnetic ratio" is often used as a synonym for a different but closely related quantity, the g-factor. The g-factor, unlike the gyromagnetic ratio, is dimensionless.

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  1. S

    B Electron gyromagnetic ratio & lattice qft

    The electron gyromagnetic ratio of 1.0011596522 is computed using perturbation method and Feynman diagrams that is said to produce a value to better than one part in 10^10, or about three parts in 100 billion. Does the nonperturbative lattice QFT also able to compute it? What is the counterpart...
  2. L

    A How the g factor comes from QFT?

    I'm reading the book Quantum Field Theory and the Standard Model by Matthew Schwartz and currently I'm studying the chapter 17 titled "The anomalous magnetic moment" which is devoted to computing the corrections due to QFT to the g factor. My main issue is in the beginning of the chapter, where...
  3. TheSodesa

    A gyromagentic ratio for a cylinder

    Homework Statement In classical physics, a system's magnetic moment can be written like so: \mu = g\frac{Q}{2M}L, where ##Q## is the total charge, ##M## is the total mass of the system and ##L## the angular momentum. a) Show, that for a cylinder (##I = \frac{1}{2}MR^2##) spinning around its...
  4. M

    Different values of g factor (gyromagnetic ratio) of nuclei

    Hi, last week I read Rabi's paper "The Molcular Beam Resonance Method". This paper contains the basic idea of the oscillation which we call "Rabi Oscillation" as many of you guys know. However, at the end of this paper, Rabi calculates nuclear magnetic moments of Li (atomic mass 6), Li (atomic...
  5. B

    Can you confirm the value of the g-factor for the spinning electron in H1?

    I am studying the angular moment(s) in an atom of H (1s) in the classical model, can you help me understand some obscure points : The mechanical orbital angular moment of the electron in 1s is L = mvr J*s: (m) 9.11*10-31 *(v) 2.1877*106* (r) .52918*10-10 = 1.0546*10-34 J*s = h/2π, the magnetic...
  6. T

    Finding the gyromagnetic ratio of an axially symmetric body

    Homework Statement So, we can presumably write that m = g L, where L is the angular momentum, g the ratio wanted, and m magnetic dipole moment of an axially symmetric body. Total mass is M, total charge Q, mass density \rho_m(r)=\frac{M}{Q}\rho_e(r), where \rho_e(r) is charge density...
  7. D

    What is the gyromagnetic ratio of spin-1 mesons?

    Hello all. Would anybody know where I can find data on gyromagnetic ratios/magnetic moments/g-factors of mesons? I find everything about nucleons, electrons and muons, but that's about where it stops. Even the Particle Data Groups is silent about it. Or is there any reason why it is not possible...
  8. T

    Gyromagnetic Ratio Question

    Homework Statement A thin uniform ring carrying a charge Q and mass M, rotates about its axis (see Figure). a) Find the ratio of its magnetic dipole moment to its angular momentum. This is called the gyromagnetic ratio. b) What is the gyromagnetic ratio for a uniform spinning sphere...
  9. T

    Gyromagnetic Ratio: Quarks, Gluons, Antiquarks

    What is the gyromagnetic ratio of quarks and gluons ? Does the ratio differs between antiquarks and quarks ?
  10. J

    Sign of the gyromagnetic ratio

    Hi, I have posted this doubt in other forums and people don't know the answer. (sorry if my English is not very good!) Let's see: to obtain the operator for the magnetic moment component of a particle, we have to apply a few factors to the spin operator, and one of them, the so-called...
  11. quasar987

    Gyromagnetic Ratio: Q/2M Explained

    Hi, The gyromagnetic ratio is the ratio of the magnetic dipole moment to the angular momentum. I really don't get how the fact that the gyromagnetic ratio of a rotating circular loop of mass M and charge Q is g = Q/2M implies that the gyromagnetic ratio of a uniform rotating spere is also...
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