ELJEN Products List EJ-260 plastic Scintillator distributed by
This green emitting plastic scintillator has been formulated for use where longer wavelength are advantageous for purpose of light piping and for better optical coupling to solidstate photosensors.   Because of its longer emission wavelength it will exhibit somewhat greater radiation hardness than conventional blue emitting plastic scintillators.
At the same time, the green fluorescence is of short enough wavelength and the scintillation efficiency high enough for successful use with determined with a flat response photo detector and would be approximately one half that level for a typical bialkali phototube.

  Physical and Scintillation Constants:
  Light Output, % Anthracene 60% EJ-260 emission spectrum
  Scintllation effici., photons/1MeV e¯ 9,200
  Wavelength of max emission, nm 490
  Rise Time, nSec  
  Decay Time, nSec  
  No. of H atoms per cm3 x 1022 5. 21
  No. of C atoms per cm3 x 1022 4. 70
  No. of electrons per cm3 x 1023 3. 35
  Density, g/cc 1. 02
Polymer Base:   Polyvinyltoluene
Refractive Index:   1. 58
Vapor Pressure:   Is vacuum-compatible
Coefficient of Linear Expansion:   7. 8 x 10-5 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
Chemical Compatability:   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 EJ-260.

G-tech, Corp.    local representative in Japan
365-1, Sayamagahara, Iruma-shi, Saitama 358-0032
Phone# 04-2935-2777 Fax# 04-2935-2778  

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