A Geiger counter is not efficient. That is, the number of events it records is always smaller than the amount of ionizing radiation that enters it. Explain why the efficiency is not 100%.
Answer to relevant QuestionsTheoretically, the tumor- killing efficiency of particle beams is much greater than that of a beam of X- rays or gamma rays. Explain why this is true. Polonium-214 can decay by alpha decay. (a) The product of its decay has how many fewer protons than polonium-214: (1) zero, (2) one, (3) two, or (4) four? (b) Write the nuclear equation for this decay and determine the ...At present, a radioactive beta source with a long half-life has an activity of 20 mCi. (a) What is the present decay rate in decays per second? (b) Assuming that one beta particle is emitted per decay, how many are ...Suppose that some ancient writings on parchment are found sealed in a jar in a cave. If carbon-14 dating shows the parchment to be 28 650 years old, what percentage of the original carbon-14 atoms still remains in the ...Which one of each of the following pairs of nuclei would you expect it to be easier to remove a neutron from: (a) 168O or 178O; (b) 4020Ca or 4220Ca; (c) 105B or 115B; (d) 20882Pb or 20983Bi? State your reasoning for ...
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