atomic-beam resonance

atomic-beam resonance

[ə′täm·ik ¦bēm ‚rez·ən·əns]
(physics)
Phenomenon in which an oscillating magnetic field, superimposed on a uniform magnetic field at right angles to it, causes transitions between states with different magnetic quantum numbers of the nuclei of atoms in a beam passing through the field; the transitions occur only when the frequency of the oscillating field assumes certain characteristic values.
References in periodicals archive ?
Atomic quadrupole moments were first measured by the shift in energy levels due to an applied electric-field gradient in atomic-beam resonance experiments [24, 25].