Theory of Atomic Hyperfine Structure

摘要: Publisher Summary This chapter discusses the principal experimental techniques in study of hyperfine interactions, such as Hamiltonian for interactions; structure one-electron atoms; and complex atoms ions. The classical method is optical spectroscopy. Resolution spectra has been improved significantly by use interferometers, Fabry-Perot etalon, place diffraction gratings. Splittings small 0.005 cm -1 (∼ 100 Mc/sec) could theoretically be resolved an interference spectrograph. In practice, however, gas phase have linewidths determined Doppler effect, which are typically order 0.1 light to 0.01 cm-' heavy atoms. Use atomic beams, broadening eliminated observing perpendicular their line flight, required measurements splittings finer than . most successful technique hfs beam magnetic resonance. Paramagnetic resonance phase3 inert matrices transition metal ions solution crystals also yielded useful data on interactions. It must, recognized that external interactions usually influence observed structure. mentions polarization spin-exchange technique.