PUBLIC HEALTH ENGLAND / SCIENCE PHOTO LIBRARY PUBLIC HEALTH ENGLAND / SCIENCE PHOTO LIBRARY
Testing a neutron density gauge. Technicians testing a neutron density gauge for a radiation leak. A neutron density gauges is used to detect the moisture content of a material, such as soil, by using radiation. It operates by using a source in the gauge that emits radioactive neutrons, which collide with hydrogen atoms in the soil.
Model release available. Property release not required.