1. Stability
   1. Neutron
      1. Deficient
      2. Rich
2. Methods
   1. Alpha
      1. 2p2n
      2. no imaging
   2. Beta
      1. e-
      2. no imaging
   3. Electron Capture
      1. gamma-rays
      2. x-rays
      3. imaging
   4. Positron
      1. e+
      2. gamma-rays
      3. imaging
   5. Transition
      1. Topic