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The following are true regarding beta particles and their interactions: a. Both electrons and positrons have a mass b. Beta particles result in a trail of ionized atomsc. The collision of two positrons results in complete annihilation of the two particles d. Positron annihilation results in the release of gamma photons e. Beta particles increase the temperature of the surrounding tissue |
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Answer» a. True. Like electrons, positrons have a relative atomic mass of 1/1840. b. True. Beta particles are secondary electrons that travel through matter resulting in a trail of ions. c. False. The collision of a positron with a negative electron results in the two charges neutralizing each other and the two masses being converted to energy (annihilation). d. True. The process of annihilation results in the release of gamma photons, which travel in opposite directions to each other. e. True. As these secondary electrons travel through tissue, some of their kinetic energy is transformed to heat energy. |
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