BC-521 Gadolinium Loaded Liquid Scintillator General Description BC-521 is formulated to yield the highest light output possible as well as long term chemical stability. The standard gadolinium concentration is 0.5% by weight, but other concentrations up to 1.5% can be supplied. Since the liquid is normally used in large tanks containing several hundred liters, it employs a high flash point solvent for safety purposes. The principal applications of BC-521 are for neutron spectrometry and neutrino research. It is ideal for use in large tanks for neutron multiplicity experiments. Gadolinium has the highest thermal neutron capture cross-section of any element. The neutron capture reaction yields beta particles and several gamma rays having a total energy of about 8 MeV. Delayed coincidence and pulse shape discrimination techniques can be employed. Properties Gadolinium Content 0.5%, w/w Density, g/cc 0.89 g/cm3 Light Output 68% anthracene (for 1% Gd concentration) 57% anthracene Decay Time, Short Component 3.6 nsec Wavelength of Maximum Emission 424 nm Bulk Light Attenuation >4 meters Refractive Index 1.50 Flash Point 44°C Atomic Composition No. of H Atoms per cm3 5.25 x 1022 No of C Atoms per cm3 4.00 x 1022 Ratio H:C Atoms 1.314 No. of Electrons per cm3 29.7 x 1022 [ Liquid 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