In an atomic nucleus, this quantity is proportional to the g-factor times the nuclear spin. For 10 points each:
[10m] Name this quantity that is said to be “anomalous” for the electron because its value deviates from a g-factor of 2. This quantity is equal to the ratio between potential energy and magnetic field strength.
ANSWER: magnetic moment [or magnetic dipole moment; accept anomalous magnetic moment; prompt on dipole moment; reject “electric dipole moment”]
[10h] The interaction between the magnetic moments of nuclei and quadrupole moments of electrons contributes to this feature. The 21-centimeter line in hydrogen occurs due to this feature.
ANSWER: hyperfine structure [reject “fine structure”]
[10e] Electron magnetic moments are written in terms of this physicist’s magneton constant. This physicist proposed a primitive model of the atom with electrons circularly orbiting a nucleus.
ANSWER: Niels Bohr [or Niels Henrik David Bohr; accept Bohr model or Bohr magneton]
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