Crystals from China: Exhibition Science Bringing Nations Together

L3 aimed to specialize in measuring electrons, positrons, and photons emerging at small angles to LEP's colliding beams with the best possible precision. To achieve this, special crystals made from Bismuth Germanate, BGO, were chosen. Such crystals had previously only been made in small quantities, a few cubic centimetres, and never with the purity required by L3. The experiment would need a massive 12 tons of BGO crystals.