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Hyperfine Structure

(spectral lines from magnetic and spin interactions between electrons and 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 Gross Structure transitions from electron movement between larger/smaller Electron Shells (all the potential electron orbits that have a certain orbital radius), that form lines such as Hydrogen's Balmer Series.

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


(spectrography,atoms,quantum mechanics,lines)
http://en.wikipedia.org/wiki/Hyperfine_structure

Referenced by:
Degeneracy Weight
Fine Structure
21cm Line

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