Pronunciation: [ɡˈamə dɪkˈe͡ɪ] (IPA) 
Gamma decay is a process in which a nucleus emits a gamma ray to reach a more stable state. The spelling of "gamma" is /ˈɡæmə/, phonetically represented as "GAM-uh". The letter 'g' is pronounced as a voiced velar stop (/ɡ/), 'a' is a short vowel sound (/æ/), and 'm' is pronounced as a voiced bilabial nasal (/m/). The last 'a' sound is silent, and the word ends with the unstressed syllable 'uh' pronounced as a schwa (/ə/).
Gamma decay is a type of radioactive decay characterized by the emission of gamma rays from a radioactive atom or nucleus. It is a natural process that occurs in unstable atomic nuclei in order to attain a more stable configuration. The gamma rays produced during this decay process consist of high-energy photons, which are a form of electromagnetic radiation.
Gamma decay usually follows other types of radioactive decay, such as alpha or beta decay. After the initial decay, the atom or nucleus remains in an excited state, which is a state of higher energy. In order to return to a more stable configuration and release this excess energy, the excited nucleus emits gamma rays.
These gamma rays have extremely high frequencies and, therefore, short wavelengths. They possess no mass or charge, and are able to penetrate matter easily due to their high energy. This makes them highly dangerous and can cause damage to living cells and tissues if exposure is prolonged or at high dosage.
The release of gamma rays during gamma decay results in a decrease in the energy and excitation level of the atom or nucleus. It is an important process in nuclear physics and is utilized in various fields, including medicine (e.g., radiotherapy and nuclear medicine) and industry (e.g., quality control and sterilization).
The term "gamma decay" is derived from the Greek letter "γ" (gamma), which represents the third letter in the Greek alphabet. In the context of nuclear physics, gamma rays are high-energy electromagnetic waves or photons that are emitted during the radioactive decay of atomic nuclei. The term "gamma" was adopted to describe this particular type of decay due to the high-frequency and energy associated with gamma rays. Therefore, the word "gamma decay" refers to the emission of gamma rays during the radioactive decay process.
