Landé interval rule

From Wikipedia, the free encyclopedia
Jump to navigation Jump to search

In atomic physics, the Landé interval rule states that if the spin-orbit interactions of an electron are weak, the energy levels of each (i.e. the spin and orbit) are split. Subsequently, each have a different angular momentum. The rule states that as a result of this, the frequency interval between successive energy levels is proportional to the larger of their total angular momentum values (J).[1][2]

Background[edit]

The rule assumes the Russell–Saunders coupling and that interactions between spin magnetic moments can be ignored. The latter is an incorrect assumption for light atoms. As a result of this, the rule is optimally followed by atoms with medium atomic numbers.[1]

The rule was first stated in 1923 by German-American physicist Alfred Landé.[1]

References[edit]

  1. ^ a b c "Landé interval rule". Science.jrank.org. Retrieved 10 October 2010.
  2. ^ Morris, Christopher G. (1992). Academic Press dictionary of science and technology. Academic Press. p. 1201. ISBN 0-12-200400-0.