21. Nuclear structure (for nucleon structure, see 14.20.D Properties of protons and neutrons; 13.40 for electromagnetic processes and properties; 13.60.H for deep-inelastic structure functions) ( 0 Dok.)

• 21.10.-k Properties of nuclei; nuclear energy levels (for properties of specific nuclei listed by ass ranges, see 27) ( 0 Dok. )

• 21.30.-x Nuclear forces (see also 13.75.C nucleon-nucleon interactions) ( 0 Dok. )

• 21.45.+v Few-body systems ( 0 Dok. )

• 21.60.-n Nuclear-structure models and methods ( 0 Dok. )

• 21.65.+f Nuclear matter Exotic atoms and molecules, see 36.10 ( 0 Dok. )

• 21.80.+a Hypernuclei ( 0 Dok. )

• 21.90.+f Other topics in nuclear structure (restricted to new topics in section 21) ( 0 Dok. )