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from Desobry & Boyer, MedPhys 21, 1994, p 1943
Simple models, parametric control of
spectral shape
1
2
3
,
,
E
E
p p p
0
10
20
30
40
50
MeV
Target material, Z=74, Emission angle=10¡
0.001
0.01
0.1
1
10.
100.
1000.
barn/Sr
50MeV
25MeV
10MeV
5MeV
0
10 20 30 40 50
0.05
0.1
0.5
1
5
10
Numerical integration of X-sections and
attenuation data, results similar to Monte
Carlo
Beam energy spectra
analytical modeling