Gamma-ray detection is a field of research focused on the development and use of detectors to identify and measure gamma rays, which are the highest-energy electromagnetic radiation in the electromagnetic spectrum. Gamma rays are emitted during radioactive decay processes, nuclear reactions, and high-energy astrophysical phenomena. Detection of gamma rays is important for a wide range of applications, including homeland security, medical imaging, nuclear physics research, and gamma-ray astronomy. Researchers in this field work on developing new types of detectors with high sensitivity and energy resolution, as well as improving techniques for data analysis and signal processing.