BC-420 Premium Plastic Scintillator General Description The premium plastic scintillators described in this data sheet 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" (100 mm). BC-420 is substantially less expensive than BC-418. General Technical Data Base Polyvinyltoluene Density 1.032 Refractive Index 1.58 Coefficient of Linear Expansion 7.8 x 10-5, below 67°C Atomic Ratio, H/C ~1.1 Light Output 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. Physical Constants Constant 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 1.3 1.3 Light Attenuation Length, cm* NA** 140 NA** Wavelength of Max. Emission, nm 391 391 370 No. of H Atoms per cm3, (x1022) 5.21 5.21 5.19 No. of C Atoms per cm3, (x1022) 4.74 4.74 4.71 Ratio H:C Atoms 1.100 1.100 1.102 No. of Electrons per cm3, (x1023) 3.37 3.37 3.34 Principal uses ultra-fast timimg ultra-fast timimg ultra-fast timimg * 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 ** Scintillator recommended for use in small sizes; therefore, the 1/e attenuation length values are not applicable Emission Spectra BC-418 & BC-420 Premium Plastic Scintillators Response to Atomic Particles Range of Atomic Particles in Premium Plastic Scintillators [ Cast plastic scintillators ] Organic Products | Inorganic Scintillation Products | Crystal Products Bicron RMP | Optics and Oxides | Crismatec | Product Search/Faq Company Profile | News | Contact Us | NE Technology | Home