Principles of Radiation Physics- Questions
and Answers| Latest Update
Because pair production involves only x-rays with energies greater than 1.02 MeV, it is
unimportant in x-ray imaging but it is very important for what other imaging modality?
Positron emission tomography (PET)
Which is true regarding an x-ray photon? The wavelength of an x-ray photon is measured
similar to that of any other electromagnetic energy.
What is the outcome when the tissue atomic number is increased during differential
absorption? No change in Compton interactions
Which factor is responsible for the neutral charge of the atom? Number of protons =
number of electrons
The kinetic energy released in gamma rays is 2 Gya. What is the intensity of gamma rays?
2 J/Kg
According to the given electron-binding energies, what is the difference in energies required to
remove a K shell electron from a barium atom and an L shell electron from a tungsten atom?
25 keV
What is the term used by physicists to describe the interactions among different energies,
forces, or masses that can otherwise be described only mathematically? Field
During pair production, the positron unites with a free electron, and the mass of both particles
is converted to energy as a result of what process? Annihilation radiation
and Answers| Latest Update
Because pair production involves only x-rays with energies greater than 1.02 MeV, it is
unimportant in x-ray imaging but it is very important for what other imaging modality?
Positron emission tomography (PET)
Which is true regarding an x-ray photon? The wavelength of an x-ray photon is measured
similar to that of any other electromagnetic energy.
What is the outcome when the tissue atomic number is increased during differential
absorption? No change in Compton interactions
Which factor is responsible for the neutral charge of the atom? Number of protons =
number of electrons
The kinetic energy released in gamma rays is 2 Gya. What is the intensity of gamma rays?
2 J/Kg
According to the given electron-binding energies, what is the difference in energies required to
remove a K shell electron from a barium atom and an L shell electron from a tungsten atom?
25 keV
What is the term used by physicists to describe the interactions among different energies,
forces, or masses that can otherwise be described only mathematically? Field
During pair production, the positron unites with a free electron, and the mass of both particles
is converted to energy as a result of what process? Annihilation radiation
