Gamma ray

Gamma Radiation
Gamma is a form of electromagnetic radiation. Gamma rays are the most energetic form of radiation, and they have very short wavelengths, being less than one tenth of a nanometer. It is one of the three types of natural radioactivity, along with alpha and beta radiation. Gamma waves are produced by the hottest and most energetic objects in the universe, such as supernova explosions, regions around black holes and neutron stars and pulsars. The more local methods of creating gamma waves are. Nuclear explosions, lighting and radioactive decay.

How to detect it
As opposed to x-rays and optical light, gamma rays can’t be captured and reflected through the use of mirrors. The wavelengths in gamma radiation are so small that they can pass through the space between the atoms of detectors. To detect gamma-rays you will usually need to use a special detector specifically for gamma-rays. These machines contain very densely packed crystal blocks. The gamma-rays that pass through the blocks collide with the electrons, this process is called Compton scattering. The gamma-ray strikes an electron and loses energy, this process creates particles that can be detected by the sensor.