2014 Med Phys I Lecture 2.2 PreTest Question Title * 1. Name: Question Title * 2. The half-life of radium is 1620 y, while the half-life of radon is 3.8 d. In the presence of radium, what is the apparent half-life of radon? 3.8 d 1620 y [3.8+(1620*365)]*0.5 d 3.8/(1620*365) d Question Title * 3. Which of the following quantities is not useful to determine the rate of production of the activation of isotopes in a neutron beam? neutron beam flux energy released during the activation process cross section of neutron interaction with the parent nuclei half life of daughter isotope Question Title * 4. The main reason 99m-Tc can be milked from 99-Mo is 99m-Tc has a much shorter half life than 99-Mo. 99m-Tc has a different atomic number than 99-Mo. 99m-Tc decays by gamma emission Question Title * 5. In transient equilibrium, the half-life and the transformation constant of the daughter isotope are less than the half-life and the transformation constant of the parent isotope. true false Question Title * 6. When the half life of the parent is shorter than that of the daughter, what can occur? transient equilibrium secular equilibrium an explosion none of the above Question Title * 7. Are there any issues that are not clear to you at this time? Done