ESTRO PT 2018

Energy loss & Stopping Power of charged particles

 E = E in -E out

E out

N in ≈ N out

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N out

C ,N in

, E in

dE dx

 E  x

 x

The particles slowly loose their energy until they come to rest.

Linear stopping power is the mean energy loss dE of a charged particle per pathlength dx in a material: S = dE/dx

Mass stopping power is defined as S divided by the density r of the traversed material: S/ r

Oliver Jäkel

Medical Physics

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