ELJEN Products List EJ-309 Liquid Scintillator
with low chemical reactivity & high flash point
distributed by
This new liquid scintillator provides several properties of particular value to research and applied physics.
  • EJ-309 is renamed type of EJ-399-09
  • Excellent chemical compatibility with nearly all plastics, including scintillating optical fibers
  • High flash point
  • Higher Light Output
  • Low chemical toxicity
The ingredients employed in this formulation provide very low solvent action and low flammability characteristics.   At the time of this writing, EJ-309 has undergone over five weeks of exposure to scintillating and WLS fibers at 60°C with no chemical attack to either the core or the cladding.   It is particularly suited for intermediate sized detectors employing common commercial plastics in their container fabrication, such acrylics and PVC.   It provides 20% greater light output than the common mineral oil based liquids scintillators having similar plastic compatibility.
The liquid base is comprised of mineral oil and high molecular weight aromatic solvents.
It exhibits very low chemical toxicity and has almost no odor.
  Light output (% of anthracene) 75%   No. of  H atoms / cm3 5. 46 x 1022
  photons produced by 1MeV e¯ 11,500   No. of  C atoms / cm3 4. 37 x 1022
  wavelength of max. emission 424 nm   H: C Ratio 1. 25
  Decay time (short component) 3. 5 ns EJ-309 Emission Spectrum
  Bulk light attenuation length > 1 meter
  specific gravity 1. 964
  Refractive Index 1. 57
  Flash Point 144°C (291°F)
  Boiling Range 290°C ~ 300°C
  Vapor Pressure @20°C > 0. 002 mmHg

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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