Across
- 7. _____close to nucleus are tightly “bound” to nucleus
- 9. _____ production does not occur in diagnostic range of energies, utilized in PET scanning, and more significant in radiation therapy
- 11. Compton scatter typically____ within diagnostic x-ray energy range
- 16. type of coherent scatter on all electrons of atom
- 19. _____ scatter is when scattered photon is redirected at some angle with a loss of kinetic energy
- 21. PE is predominant interaction in higher atomic_____ materials
- 22. Photon transfers some of its kinetic energy to _____ (Compton) electron and continues on in a different direction
- 23. Recoil electron behaves as a ____ electron
- 28. Reduction in number of x-ray photons in beam, resulting of x-ray photons interacting with matter at the atomic level
- 29. Ion pair formed when electron is ejected from atom known as ____
- 31. Recoil electron _____ until it fills vacancy in another atom
- 32. electron binding energy is dependent on____ number of the element
- 34. Photoelectron characteristics: Kinetic energy,_____, Reabsorbs quickly
- 36. High kVp and low m A s produce more Compton interactions but less patient ____
- 37. Inner shell electron vacancy makes atom electrically _____
- 38. Radiation that originates from irradiated material _____x-ray tube
- 39. Electron kinetic energy is Dynamic energy of electron due to its relative _____ in the electron orbital cloud
- 41. Incident photon energy (Ei) must be greater than or _____ to binding energy (Eb) of inner shell electron
- 42. Electrons _____ away are weakly attracted to nucleus and easily removed
- 44. _____ Z# atoms experience P E absorption interaction with K-shell
- 45. P E absorption interaction more likely to occur if ____ photon energy (Ei) and inner shell electron binding energy (Eb) are close to each other
Down
- 1. As kVp _______, number of photons transmitted without interaction _____
- 2. _____ photons emitted from atoms of patient after P E absorption interaction
- 3. what scatter has no clinical value, diagnostically Involves low-energy photons Below 10 keV?
- 4. the scatter from Compton scatter travels in a ____ direction
- 5. Electron binding energy is a A ____ energy from the positive charge of the nucleus
- 6. Electrons in inner shells (K, L, M) have ____ kinetic energy but higher binding energies
- 8. Incident photon (Ei) interacts with outer shell, loosely bound electron and ____ it
- 10. Incident photon energy completely ____ by inner shell electron
- 11. Scattered photon continues to interact until absorbed _____
- 12. Within attenuated beam: As ___ increases, Compton effect increases
- 13. P E absorption interaction more likely to occur in _____ with higher Z#
- 14. Within attenuated beam: As kVp increases, PE absorption _____
- 15. ____shell electrons have higher binding energy due to proximity to positively-charged nucleus
- 17. ______Z# atoms experience P E absorption interaction in K, L, or M-shell
- 18. Extremely high-energy photon 10 MeV or greater, absorption of photon by nucleus Excited nucleus releases alpha particle.
- 20. Electrons in _____shells possess higher kinetic energy
- 24. High-energy photons interact with ___
- 25. the nucleus consist of ____
- 26. Most of x-ray beam is attenuated while some of the beam is _____
- 27. Low-energy photons interact with whole ____
- 30. Introduction of _____ agents results in increased P E absorption
- 33. type of coherent scatter on a single outer shell electron
- 35. Compton is predominant in ____ tissues
- 40. Atom _____ itself by releasing photon equal in energy to incident photon (Ei), but in a different direction
- 43. ____ interaction can occur with entire atom, atomic nucleus, and orbital electrons