What that means is that high energy particles deposit little energy at first, but as they gradually slow down they deposit more and more. There is a peak where most of the energy is deposited, depending on the starting energy and density of material (tissue). This is called the Bragg Peak and having non-constant (range of) starting energies you can specify a range of dosage deposition instead of a single point.
With physics.
The particles lose energy roughly depending on their inverse velocity(=>energy) squared
What that means is that high energy particles deposit little energy at first, but as they gradually slow down they deposit more and more. There is a peak where most of the energy is deposited, depending on the starting energy and density of material (tissue). This is called the Bragg Peak and having non-constant (range of) starting energies you can specify a range of dosage deposition instead of a single point.