Neutrons

The atomic model by Bohr shows the negative electrons circling around the nucleus. Within the nucleus are the positively charged protons and the neutral neutrons. (Graphics: systemdesign.ch)

The neutron is one of the building blocks of atomic nuclei. More than half of the mass of matter surrounding us consists of neutrons. Due to their very special properties, free neutrons are an ideal tool, especially in the investigation of materials and basic research.