Which type of radiation is known to move both fast and slow?

Neutron radiation is unique in that it consists of neutrons, which are uncharged particles. Because they carry no electrical charge, neutrons can travel through various materials differently compared to charged particles. In terms of speed, neutrons can be classified as fast or slow, depending on their energy levels. Fast neutrons have higher kinetic energy and are more penetrating, while slow neutrons have lower energy and interact more readily with materials, such as hydrogen, which can slow them down significantly.

This dual characteristic of fast and slow movement makes neutron radiation particularly significant in certain applications, like nuclear reactions and radiation shielding. Understanding this distinction is crucial for radiological practices, as it influences how we manage exposure and safety protocols in environments where neutron radiation may be present.