BC-400
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General Description

The premium plastic scintillators BC-400, BC-404, BC-408, BC-412 and BC-416 include the most economical (BC-416) as well as those with the highest light output.
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General Technical Data

Base Polyvinyltoluene
Density 1.032 g/cc
Refractive Index 1.58
Coefficient of Linear Expansion 7.8 x 10-5, below 67°C
Atomic Ratio, H/C ~1.1
Light Output Temperature Dependence At +60°C = 95% of that at +20°C; independent of temperature from -60°C to +20°C
Vapor Pressure May be used in a vacuum
Solubility Soluble in aromatic solvents, chlorine, acetone, etc. Insoluble in water, dilute acids, lower alcohols, silicone fluid, grease and alkalis.

Properties

. BC-400 BC-404 BC-408 BC-412 BC-416
Light Output, % Anthracene 65 68 64 60 38
Rise Time, ns 0.9 0.7 0.9 1.0 _
Decay Time, ns 2.4 1.8 2.1 3.3 4.0
Pulse Width, FWHM, ns 2.7 2.2 ~2.5 4.2 5.3
Light Attenuation Length, cm* 160 140 210 210 210
Wavelength of Max. Emission, nm 423 408 425 434 434
No. of H Atoms per cm3, (x1022) 5.23 5.21 5.23 5.23 5.25
No. of C Atoms per cm3, (x1022) 4.74 4.74 4.74 4.74 4.73
Ratio H:C Atoms 1.103 1.100 1.104 1.104 1.110
No. of Electrons per cm3, (x1023) 3.37 3.37 3.37 3.37 3.37
Principal uses/applications general purpose fast counting TOF counters, large area large area large area, economy

*The typical 1/e attenuation length of a 1 x 20 x 200 cm cast sheet with edges polished as measured with a bialkali photomultiplier tube coupled to one end

Emission Spectra

BC-400

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Response to Atomic Particles

Range of Atomic Particles in
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