An early model for this phenomenon was the "core" or "rump" model advanced by Heisenberg.
An early model for this phenomenon was the "core" or "rump" model advanced by Heisenberg. Some of the complexities observed in this phenomenon led to Uhlenbeck and Goudsmit's spin hypothesis. The Breit-Rabi equation gives its transition energies in terms of the hyperfine energy splitting, the Bohr magneton and the Landé g-factor. Transitions with non-zero net electron spin yield the anomalous variety of this phenomenon, and its strong-field limit is called the Paschen-Back effect. FTP name this splitting of spectral lines by external magnetic fields.
An early model for this phenomenon was the "core" or "rump" model advanced by Heisenberg.
{Zeeman} Effect