Editing Angular momentum coupling (section)

==Spin–spin coupling==
{{See also|J-coupling|Dipolar coupling|NMR spectroscopy}}

'''Spin–spin coupling''' is the coupling of the intrinsic angular momentum ([[Spin (physics)|spin]]) of different particles.
[[J-coupling]] between pairs of nuclear spins is an important feature of [[nuclear magnetic resonance]] (NMR) spectroscopy as it can
provide detailed information about the structure and conformation of molecules. Spin–spin coupling between nuclear spin and electronic spin is responsible for [[hyperfine structure]] in [[atomic spectra]].<ref>{{cite book|title = Quanta: A handbook of concepts|author=P.W. Atkins|publisher=Oxford University Press|year=1974|page=226|isbn=0-19-855493-1}}</ref>