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Rexon - Model RP-400 -Plastic Scintillators
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-400 (having the same formulation as NE 102A) is truly the general purpose scintillator that has been the mainstay over the past fifty years for use in industrial and health physics measurement alpha, beta, gamma and neutron radiation as well as numerous medical instruments and scientific research ranging from low background shields in nuclear physics to space-borne astrophysics systems. It is available in geometries ranging from very thin films to thick cast sheet, rods and ingots.
Forapplications that require the scintillation light to traverse over 100 cm, a slight modification of the formulae provides the P-408. While the light output decreases from 65% to 64% in RP-408, the decay time becomes shorter (from 2.4 ns to 2.1 ns) with a MAJOR IMPROVEMENT (.50%) in bulk light Attenuation Length. Refer to RP-408 for additional details.
GENERAL PROPERTIES
- Polymer Base: Polvinyltoluene
- Density , g/cc: 1.02
- Refractive Index: (ND): 1.58
- Softening Point: 70 oC
- Coeff. of Linear Expansion: 7.8x10-5 Below +67oC
- Vapor Pressure: Negligible. May be used in high vacuum.
- Light Output vs Temperature: At +60oC is 95% of that at +20oC.- No change from +20oC to -60oC.
- Radiation Length: 43cm
- Radiation Detection: alpha, beta, gamma,
SCINTILLATION PROPERTIES
- Light Output , % Anthracene : 38
- Scintillation Efficiency, Photons/ MeV: 9,200
- Wavelength of Max. Emission, nm: 435
- Rise Time, ns: 1.0
- Decay Time, ns: 3.3
- Pulse Width, FWHM, ns:4.2
- Atomic Ratio, H/C: 1.10
- No. of H Atoms per cm3, x 1022 : 5.17
- No. of C Atoms per cm3, x 1022 : 4.69
- No. of Electrons per cm3, x 1022 : 3.33