ATP Barcelona 2017

Energy lost = Dose deposition

H. Bethe: Annalen der Physik. 397, Nr. 3, 1930

• Heavy charged particle follow the Bethe-Bloch formula:

   A Z z K 2 1   

  

   I W cm 2 2 max β

2 2

( 1 2 ln e

1

ds dE

⋅

⋅

β

2

SDBB

−

=

⋅ ⋅

+ −

)

2

2

−

⋅

ρ

β

β

• First approximation: 1/ v 2  Bragg peak