Particle radiation

Particles can be electrically charged or uncharged: Particle radiation can be emitted by an unstable atomic nucleus (via radioactive decay), or it can be produced from some other kind of nuclear reaction.

[2] The charged particles mentioned above all belong to the ionizing radiations.

When passing through matter, they ionize and thus lose energy in many small steps.

The range depends upon the type of particle, its initial energy, and the material it traverses.

The stopping power and hence, the density of ionization, usually increases toward the end of range and reaches a maximum, the Bragg Peak, shortly before the energy drops to zero.