It is significant because not all radiation has the same biological effect. X rays have the same characteristics as gamma ways, but they are produced differently. In 1895 Wilhelm Roentgen observed that when high-speed electrons hit metals, the electrons stopped and released an electromagnetic wave. He named this energy wave an x ray. Neutrons are released during the nuclear fission process and during certain nuclear reactions.
Neutrons trigger the nuclear chain reaction.
Neutrons do not carry an electrical charge. The half life is simply the average amount of time it takes for half of the source to decay into something else. Half-lives can range from very short time periods to as long as billions of years. The amount of time spent near a source of radiation affects the amount of exposure received. The farther the distance from the radiation source, the less the amount of exposure will be.