23.20.-g Electromagnetic transitions
- 23.20.En Angular distribution and correlation measurements
- 23.20.Gq Multipole mixing ratios
- 23.20.Js Multipole matrix elements
- 23.20.Lv gamma transitions and level energies
- 23.20.Nx Internal conversion and extranuclear effects (including Auger electrons and internal bremsstrahlung)
- 23.20.Ra Internal pair production