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BUT
Irradiation produces
luminiscence
Light is guided through optical fiber
to a photomultiplier
The signal is proportional to
absorbed dose
When we irradiate optical
fiber Cerenkov light is
produced
Cerenkov light depends on the
length of fiber irradiated, not
proportional to dose
Cerenkov light and luminiscence
have different wave lenghts
Spectral
discrimination
method
Organic scintillator
(W1 Standard Imaging)