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 Plastic scintillators are a solid solution of luminophors
(luminescent additives), in a transparent polymer (polystyrene (PST)).
Many characteristics of plastic scintillation materials (light output,
transparency to own emission, decay time, radiation resistance) can be varied by
changing their composition.
Polystyrene-based scintillators
Scintillators with a polystyrene matrix are used to
detect alfa-, beta, and gamma- radiation, and fast neutrons.
Plastic scintillators are prepared by bulk polymerization in aluminium (size up
to 3.5 m) or glass cast and by pressure molding technique.
By varying the composition, we can produce:
 | fast plastic scintillation material: decay time from 0.9 to 0.5 ns, light output 55-50% of anthracene; |
| plastic scintillation material having the slow decay component: decay time from 300 to 400 ns, light output 45-40% of anthracene; |
| radiation hard plastics (UPS-92RH with dia.16x10 мм has 50 % of the initial light output after irradiation at 18 МRad); |
| plastic scintillation material of elevated radiation resistance; |
| scintillation polystyrene with the light scattering additive; |
| scintillation material for dosimetry; |
| scintillation polystyrene containing soluted organic compounds of heavy elements (Pb -12%, Sn -10%). |
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| Properties | Polystyrene (PST) | | |
| | | Absorption coefficient [cm-1] | 0.01-0.003 |
| | | Softening temperature [K] | 355-360 |
| | | Wavelength of emission maximum [nm] | 430 |
| | | Light output [% of anthracene] | 56 |
.Back to top Selector Guide for Plastic Scintillators | Scintillators | Important properties | Applications comments | | | |
| | | | UPS-89, UPS-923A, UPS-90, UPS-96 | Very high light output, good transparency, short decay time | General purpose, particle detection |
| | | | UPS-92S | Slow decay time | Phoswiches |
| | | | UPS-91F | Ultra fast decay time | High energy physics, calorimetry |
| | | | UPS-92RH | Radiation hard | High energy physics, calorimetry |
| | | | UPS-96M | Pressure molding technique, very cheap | High energy physics, calorimetry |
| | | | UPS-976, UPS-971, UPS-972, UPS-973, UPS-974 | Various wavelengths of maximum emission | Operation with fiber shifters |
.Back to top Physical Properties of Plastic Scintillators | Scintillators | Light output % anthracene | Wavelength of max. emiss., nm | Rise time, ns | Decay time, ns | Light attenuation length, cm | Analoges | | | | | | | |
| | | | | | | | UPS-89 | 65 | 418 | 0.9 | 2.4 | 360 | NE102A |
| | | | | | | | UPS-923A | 60 | 425 | 0.9 | 3.3 | 400 | BC400, NE114 |
| | | | | | | | UPS-90 | 50 | 418 | 1.0 | 3.5 | 400 | NE110 |
| | | | | | | | UPS-92S | 44 | 380 | 0.9 | 380-450 | 350 | BC412, NE115 |
| | | | | | | | UPS-91F | 39-45 | 390 | 0.7 | 0.6-0.4 | - | PilotV, BC422Q |
| | | | | | | | UPS-92RH | 60 | 425 | - | 3.5 | 350 | SCSN81 |
| | | | | | | | UPS-97G | 60 | 425 | 0.9 | 3.3 | 60 | BC444 |
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| Copyright © 2004-2014 by ScintiTech. All rights reserved. |
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