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T
otal
E
nergy
R
eleased per unit
Ma
ss
TERMA
refers to the total energy removed from the primary beam
(energy of secondary electrons + scattered photons)
[ ]
µ
Ψ=
Gy
T
ρ
TERMA always greater than Kerma by
tr
µ
µ
E
E
Note
tr
tr
ρ
µ
=
ρ
µ
:
ρ
µ
Ψ=
tr
K