Dose 2016

5.2 Establishing a "transport formula"

(3) The number of particles j that are born in the scattering interactions with medium atoms in ∆ V :

Introducing as the probability per unit path length that a particle j' with energy E' and direction Ω ' will produce a secondary particle j with energy E and direction Ω , we ' j j → σ have:

3

∑ ∫ ∫ ∫ σ

d

N

d d ' d ' L E Ω

=

⋅

j,secondaries

'

'

j

j

j

→

' 1 = Ω

j V E

d

3

∑ ∫ ∫ ∫ σ

d ' d ' d d d

E E V

=

⋅ Φ Ω Ω

'

'

j

j

j

→

' 1 = Ω

j V E

d

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