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Hyperfine Structure

(spectral lines due to magnetic and spin interactions between electrons nucleus)

Hyperfine Structure of atomic energy levels and Spectral Lines are energy-level-transitions due to spin and magnetic interactions between electrons and the nucleus (Hyperfine Levels). They are orders of magnitude smaller than Fine Structure transitions, which, in turn is orders of magnitude smaller than the Gross Structure lines such as the Balmer Series, for Hydrogen, which consist of electrons moving to smaller orbits.

A hyperfine structure line widely used in astrophysics is hydrogen's 21cm Line, due to the electron changing its spin.

(spectrography,atoms,quantum mechanics,lines)

Referenced by:
Degeneracy Weight
Fine Structure
21cm Line