Woit · §7.2 The spin 1/2 particle in a magnetic field
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英文 OCR 草稿
The source names g the gyromagnetic ratio and gives approximate values.
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Here is the vector describing the magnetic field, and
is an operator called the magnetic moment operator. The constants that appear are: − the electric charge, the speed of light, the mass of the particle, and a dimensionless number called the “gyromagnetic ratio”, which is approximately 2 for an electron, about 5.6 for a proton.