Plastic crystal scintillator combines the two importantproperties of long attenuation length And fast timing and is thereforeparticularly useful for time-of-flight systems Using scintillators greater thanone meter long. Typical measurements of 4 meter Optical attenuation length areachieved in strips of cast sheet in which a
Representativesize is 2cm x 20cm x 300cm.
The combination of long attenuation length, high light output, and emissionspectrum well matched to the common photomultipliers recommends it as thedetector of choice for many industrial applications such as gauging andenvironmental protection where high sensitivity of signal uniformity arecritical operating requirements.
Physical and Scintillation Constants:
Light Output, % Anthracene
Wavelength of max emission, nm
Rise Time, nSec
Decay Time, nSec
Pulse Width [FWHM], nSec
No. of H atoms per
cm 3 x 10 22
No. of C atoms per
cm 3 x 10 22
No. of electrons per
cm 3 x 10 23
Coefficient of Linear Expansion:
7.8 x10 - 5 below +67° C
Light Output vs. Temperature:
at +60° C, L. O. =95% of that at +20° C
No change from +20° C to -60° C
Is attacked by aromatic solvents, chlorinated solvents, ketones, solvent bonding cements, etc.
It is stable in water, dilute acids and alkalis, lower alcohols and silicone greases. It is safe to use most epoxies and " super glues" with