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RP-408

           Components & TLD Systems, Inc.

 

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GENERAL INFO

CRYSTAL SCINTILLATORS

PLASTIC SCINTILLATORS

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ACCESSORIES

NEWS

GENERAL PROPERTIES
Polymer Base:                           Polvinyltoluene
Density , g/cc:                            1.032
Refractive Index:                      (ND): 1.58
Softening Point:                         70oC
Coeff. of Linear Expansion:      (<67oC): 7.8x10-5 / oC
Vapor Pressure: Negligible. May be used in high vacuum.
Light Output vs Temperature:  Independent of temperature
from -60oC  to +20oC. At +60oC is 95% of that at  +20oC
Radiation Length:                      43cm
   

       RP-408 EMISSION SPECTRUM

SCINTILLATION PROPERTIES

Light Output ,                             % Anthracene :      64
Scintillation Efficiency,              Photons/ MeV: 10,000
Wavelength of Max. Emission, nm:  425
Rise Time,    ns:                          0.9
Decay Time, ns:                          2.1
PulseWidth, FWHM, ns:            .2.5
Atomic Ratio, H/C:                    1.10
No. of  H  Atoms per cm3, x 1022 : 5.23
No. of  C  Atoms per cm3, x 1022 : 4.74
 

 

  Plastic Scintillators offer high performance, ease of handling, mechanical stability at a relatively low cost.  The versatility of plastic
scintillators makes them the ideal choice for large area and specially shaped detectors.
 
RP-408 combines two important properties:
              Relatively Fast Decay (2.1 ns) - useful for time-of-flight systems where timing is critical, and
              Long Optical Attenuation Length - Typical measurements of 4 meter optical attenuation length are achieved in strips
              of cast sheet in which a representative size is 2 cm x 20 cm x 300 cm.
 
The emission spectrum (425 nm) is well matched to common photomultipliers. RP-408 is the detector of choice for many
industrialapplication such as in gauging and environmental protection where high sensitivity of signal uniformity are critical
operating requirements. Commercially, it is the most preferred Plastic Scintillator in use.
 

                             RESPONSE OF PVT BASE PLASTIC SCINTILLATORS

RANGE OF CHARGED PARTICLES IN MM          

                                         TO CHARGED PARTICLE EXCITATION

IN REXON PLASTIC SCINTILLATORS        

ENERGY IN MEV

ENERGY IN MEV

Effects of liquids
 
The plastic scintillators are soluble in aromatic solvents, acetone chlorinated solvents etc. They are unaffected by water , dilute
acids, alkalis, lower alcohols, pure methyl alcohol, silicone grease or fluid.
 
Standard Sizes and Shapes
 
Sheet Sizes range up to 200" (5m) long by 36" (914mm) wide. blocks are available up to 96" (2.5m) long while Rods up to
48" (1220mm diameter are manufactured. Call for standard sizes of annuli, well counters, thin films and spheres.
 
Handlingandcleaning
 
Plastic scintillators sheets are supplied with a protective paper that should not be removed until ready for use. It is advisable to
handle all plastic scintillators with cotton or terylene gloves. If the scintillator requires cleaning we recommend a dilute solution of
liquiddetergent and a Selvyt polishing cloth or BPC grade cotton wool. Alternatively, We can supply  excellent cleaning and
polishing solutions. Use of this can often increase the measured light attenuation length. Ethanol or methanol may be used.
Machining instructions are available upon request.
 
Accessories:
 
RX-688    Optical Coupling Grease
XR-560    REFLECTIVE PAINT-Super White for ALL Scintillators and Light pipes-water base
PMTS       Rexon "P" Line of generic photomultipliers for allapplications at LOW COST.
XR-61/10 High Reflectance Special Grade of Teflon - NOT FOR SOME TYPESOFPLASTIC
RX-79       Index matching epoxy for Plastic Scintillators. Available in 200 cc and 400cc kits.
  ALSO SEE - Accessories

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Phone 216-292-7373 Fax 216-292-7714