Dose Course 2018_Flipping book

Beam energy spectra analytical modeling

barn/Sr

Target material, Z=74, Emission angle=10¡

1000.

100.

5MeV

10.

10MeV

1

MeV

25MeV

0

10

20

30

40

50

0.1

50MeV

0.01

Numerical integration of X-sections and attenuation data, results similar to Monte Carlo

0.001

10

5

1

0.5

0.1

0.05

0

10 20 30 40 50

Simple models, parametric control of spectral shape ( ) 1 2 3 , , E E p p p   =

26

from Desobry & Boyer, MedPhys 21, 1994, p 1943