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Which of the following are true regarding gamma rays? a. They are released following the interaction of electrons with a tungsten target b. They have a mass c. They form a line spectrum, representing energy levels that are specific to the nuclide that emits them d. They have a frequency proportional to their energy e. They can be absorbed within the emitting atom |
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Answer» a. False. Electromagnetic radiation is identified according to its source. Electrons interacting with a tungsten target, in an X-ray tube, form X-rays. Gamma rays are formed as a result of radioactive decay in the nucleus. b. False. Gamma rays have similar properties to X-rays, both of which have no mass. c. True. d. True. Similar to X-rays, frequency is proportional to photon energy, which is inversely proportional to wavelength. e. True. Gamma rays can interact with an inner-shell electron displacing it from the atom (conversion electron). The vacancy is filled with an electron from the outer shell leading to X-ray emission. This process is known as ‘internal conversion.’ |
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