Luminescent detectors measure exposures to neutrons. Arriving radiation changes the energy content of solids in the detectors. The energy change causes them to emit light. The amount of light is proportional to the energy change. In scintillation detectors incoming radiation strikes a thin layer of crystals or a solution of organic materials that produce light.
Light output is proportional to the radiation absorbed.
These devices measure alpha, beta, gamma and slow neutron sources. Engineered Controls Administrative Controls Engineered Controls Engineered Controls are the primary means of controlling radiation exposure. Particulates that are large enough will settle out of air. Thus, distance will reduce the likelihood of exposure to radioactive materials released from an operation. Radiation levels decrease with the square of distance.