2014 Med Phys I Lecture 3.1b PreTest Question Title * 1. Name: Question Title * 2. What does not occur with the photoelectric effect? characteristic radiation Auger electrons scattered photon ionized atom Question Title * 3. The photoelectric effect is: A photon interaction with nucleons that results in elastic scattering A photon interaction with atomic electrons that results in complete absorption of the photon A photon interaction wtih atomic electrons that results in inelastic scattering A photon interaction with an electric field surrounding electrons that results in elastic scattering Question Title * 4. Photoelectric absorption is most probable at: Low energies and low Z Low energies and high Z High energies and low Z High energies and high Z Question Title * 5. Assuming that all of the photon’s energy goes into the electron collision (neglect recoil of nucleus), the ejected electron in a photoelectric interaction will have a kinetic energy ___ compared to the energy of the incoming photon. Greater than Less than Equal to Question Title * 6. In which of the following would the attenuation coefficient for the photoelectric effect be the highest Tissue irradiated by a high energy beam. Tissue irradiated by a low energy beam. Bone irradiated by a high energy beam. Bone irradiated by a low energy beam. Question Title * 7. Are there any issues that are not clear to you at this time? Done