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Dimensions of a pencil kernel
(
)
(
) (
)
Field
, ,
,
,
, d d
p
D x y z
x y
x x y y z x y
=
− −
Basic dose equation
Hence, the dimension is energy fraction per mass, or mass
-1
(since
energy fraction is dimensionless).
Dimensional analysis
integration element
Field
dose
energy fluence
pencil kernel
deposited energy
Energy
Energy incident energy
area
mass
area mass
=
concepts: