Science, asked by nikeeta20, 1 month ago

difference between x rays and y rays​

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Answered by shavadhesh324
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Answered by IndiaPedia
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Gamma ray and X-ray photons are usually distinguished by the processes that made them. But there is some field-specific variation in the definitions.

One definition is that the term gamma ray is used for photons from naturally occurring sources (e.g. gamma decay), and X-ray is used for photons from man-made machines (e.g. Bremsstrahlung radiation).

Another definition is that gammas are from radioactive atomic nuclei and X-rays are from electron excitation/acceleration.

A third definition, often used in astronomy where the origin may not be known, is that higher energies (~MeV) are called gamma rays, and lower energies (~keV) are called X-rays.

To clarify, photons that are known to come from gamma decay of radioisotopes are always called gamma rays. In addition, high energy photons (~1 MeV and up) from natural phenomena that are not from radioactive nuclei may also be called gamma rays (Gamma Ray Burst, Terrestrial Gamma Flash etc)

The term X-ray is used for photons with energies ~1 keV and up that usually, but not always, come from are man-made machines. Similarly, X-rays come from one of several processes that usually, but not always, involve electrons. Some examples of X-ray producing processes are: charged particles interacting with atomic nuclei (e.g. Bremsstrahlung X-rays used in medical imaging), excitation of atomic electrons (e.g. characteristic X-rays) and charged particles interacting with magnetic fields (e.g. synchrotron X-rays). Although X-rays are usually in the 1–100 keV energy range, they can be produced with energies beyond 10 MeV (e.g. in radiotherapy linacs).

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