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Rad 201 exam 2

rad 201 exam 2

QuestionAnswer
Which of the following is not another term for coherent scattering? Characteristic
What radiation occurs when an electron drops from an outer shell to fill an inner-shell vacancy? Characteristic x-ray (characteristic photon)
Which is not a type of interaction between x-radiation and biologic matter? Bremsstrahlung
Which particle is considered antimatter? Positron
What particles have no mass, no charge, and travel at the speed of light? X-ray photons
Air is approximately how much less dense than soft tissue? 1000 times smaller
What is the effective atomic number of compact bone? 13.8
Which two interactions can produce small-angle scatter? Coherent scattering and Compton scattering
During coherent scattering, a low-energy x-ray photon interacts with what? The entire atom, causing electrons to vibrate and emit electromagnetic waves
Photoelectric absorption increases as photon energy does what and atomic number does what? Decreases; increases
What photon energy is required for pair production? 1.022 MeV
What electron is ejected when characteristic energy is transferred to another electron? Auger electron
If one structure is twice as thick as another with the same density and atomic number, how many photons does it absorb? Twice as many x-ray photons
What is another name for fluorescent radiation? Characteristic radiation
What are the by-products of photoelectric absorption? Photoelectron and characteristic photon
Created by: edwingp
 

 



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