BC-418, BC-420, BC-422, BC-422Q

Fast Timing

BC-418, BC-420 and BC-422 are intended for use in ultra-fast timing and ultra-fast counting applications.

 

BC-418 and BC-422 are recommended for use in small sizes, i.e. when any dimension is less than 4” (100mm). BC-420 is substantially less expensive than BC-418.

 

BC-422Q is BC-422 quenched with various weight percentages of benzophenone (specified at time of order) to improve timing properties. The faster timing comes at the expense of total light output, however.

 

Applications

BC-418: Ultra-fast timing, small sizes

BC-420: low self-absorption Ultra-fast timing, for sheet areas < 100mm2

BC-422: Very fast timing

BC-422Q: Ultra-fast timing, ultra-fast counting

Features/Benefits

BC-418 1.4 ns time constant

BC-420 1.5 ns time constant

BC-422 1.4 ns time constant

BC-422Q Quenched, 0.7 ns time constant

Specifications

Scintillation Properties
  BC-418 BC-420 BC-422
Light Output, %Anthracene 67 64 55
Rise Time, ns 0.5 0.5 0.35
Decay Time (ns) 1.4 1.5 1.6
Pulse Width, FWHM, ns 1.2 1.2 1.3
Wavelength of Max. Emission, nm 391 391 370
Light Attenuation Length, cm* NA** 140 NA**
Bulk Light Attenuation Length, cm 100 110 8
Atomic Composition      
No. H Atoms per cc (x1022) 5.21 5.21 5.19
No. C Atoms per cc (x1022) 4.74 4.74 4.71
Ratio H:C Atoms 1.1 1.1 1.102
No. of Electrons per cc (x1023) 3.37 3.37 3.34
*The typical 1/e attenuation length of a 1x20x200cm cast sheet with edges polished as measured with a bialkali photomultiplier tube coupled to one end.
** Scintillator recommended for use in small sizes; therefore, the 1/e attenuation length values are not applicable.

 

Weight % Benzophenone None
(BC-422)
0.5 1 2 3 5
Light Output, %Anthracene 55 19 11 5 4 3
Rise Time, ps 350 110 105 100 100 100
Decay Time (ns) 1.6 0.7 0.7 0.7 0.7 0.7
Pulse Width, FWHM, ps 1300 360 290 260 240 220

 

Packaging Options
  • Supplied as cast sheets, rough cut or diamond milled
  • Polished rods

Additional enhancements:

  • Reflector and light tight wrapping
  • Light guides
  • Light sensors such as photomultiplier tubes (PMT) and silicon photomultipliers (SiPM)
  • Mu-metal light shield
  • Electronics
Size Range

These scintillators are typically used in sizes smaller than 100mm2.

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”)
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

 

BC418-420-422 Data Sheet.pdf

BC-418, BC-420, BC-422 fast timing plastic scintillators

PDF | 269.04 KB
BC418-420-422 Data Sheet
Data Sheets
BC-422Q Material Data Sheet

Quenched plastic scintillator is intended for use in ultra-fast timing and ultra-fast counting applications

PDF | 159.76 KB
BC422Q-Data-Sheet