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Summary
3) A radiation transport formula can be derived from
bookkeeping process of particles in the phase space:
j
j,E,
,
d
d
d d
j att
j
V
N
E
Ω
= Ω −Ω∇Φ − ⋅ Φ +
∫
ur
σ
net number
attenuation term
3
'
'
' 1
d ' d '
d
j
j
j
j
jE
E Q V
→
= Ω
⋅ Φ Ω +
∑∫ ∫
σ
through surface
secondary particle
production
source term
52