gamma rays are High-energy electromagnetic radiation emitted by certain radionuclides when their nuclei transition from a higher to a lower energy state. These rays have high energy and a short wavelength. All gamma rays emitted from a given isotope have the same energy, a characteristic that enables scientists to identify which gamma emitters are present in a sample. gamma rays are very similar to x-rays. [For additional information see Understanding Radiation: gamma rays.]

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List of books: Gamma,rays