1.

Which of the following are true regarding radioactive decay? a. The unit of radioactive decay is the becquerel (Bq) b. Beta-particle emitters used in nuclear medicine can only be produced in a nuclear reactor c. Radioactive decay rate is measured by absorbed energy (kg of tissue)-1 min-1 d. The lower the number of radioactive atoms in a sample, the greater the count rate e. A radio nuclide will always undergo radioactive decay within the known half-life of the isotope

Answer»

a. True. 

b. False. For example, Re-188 is generator produced. 

c. False. This is a measurement of radiation dose, not activity. 

d. False. Count rate is proportional to the number of atoms in a sample. 

e. False. Radioactive decay is a stochastic process; however, within a half-life there is a 50% chance of a particular atom of a radioactive material decaying.



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