BC-444

Long Timing Constant Plastic Scintillators

BC-444 is a plastic scintillator developed to have long timing properties. Applications include heavy-ion research, particle identification, low background counting, active shielding and dosimetry. BC-444 can be used either by itself or in conjunction with a fast scintillator such as BC-400.

 

BC-444 is available in a variety of shapes and sizes. The material has the same kind of mechanical handling properties as Saint-Gobain Crystals other premium plastic scintillators.

BC-444 Emission Spectra

Specifications

Scintillation Properties
Light Output, %Anthracene 41
Rise Time (10-90%), ns 19.5
Integral Rise Time (10-90%), ns 28.5
Decay Time (ns) 285
Wavelength of Max. Emission, nm 428
Light Attenuation Length, 10 mm sheet, cm 180
Atomic Composition  
No. H Atoms per cc (x1022) 1.109
No. C Atoms per cc (x1022) 5.25
Ratio H:C Atoms 4.73
No. of Electrons per cc (x1023) 3.37
Size Range

These plastic scintillators can  be made in various shapes and size.

Standard cast sheet sizes:

  • 0.5 - 1 mm thick 30 x 60 cm (0.020 – 0.040” thick 11.81” x 23.62”)
  • 1.5 mm thick 30 x 101 cm (0.059” thick 11.81” x 39.76”)

  • 2 mm thick 45 x 101 cm (0.078” thick 17.72” x 39.76”)

  • 3 mm thick 63 x 101 cm (0.118” thick 24.8” x 39.76”)

  • 5, 6.4, 10, 12.7, 20, 25, 38 and 50 mm thick 63 x 203 cm (0.197”, 0.25”, 3.937”, 0.5”, 0.787”, 0.984”, 1.496”, 1.968” thick  24.8” X 79.92”)

  • 75, 100, 125, 150 mm thick 60 x 101 cm (2.953”, 3.937”, 4.921”, 5.906” thick 23.62” x 39.76”)

Special large cast sheet are available for thickness above 5mm

General Technical Data
Base Polyvinyltoluene
Density [g/cc] 1.023
Expansion Coefficient
(peroC,<67oC)
7.8X10-5
Refractive index 1.58
Softening Point 70°C
Vapor Pressure May be used in vacuum
Solubility Soluble in aromatic solvents, chlorinated solvents, acetone, etc. Unaffected by water, dilute acids, lower alcohols, alkalis and pure silicone fluids or grease.
Light Output At +60oC = 95% of that at+20oC. Independent of temperature from -60oC to +20oC