Ch. 7 X-Ray Production Flashcards
Almost all of the kinetic energy of the incident electrons is converted to:
Heat.
What percentage of target interaction results in the production of x-ray photons?
1%
The transfer of the incident electrons’ kinetic energy to the outer-shell electrons causing vibration of the outer-shell electron results in the emission of:
Infrared radiation
The types of target interaction that occur in the production of x-ray photons in the diagnostic range are dependent upon the:
Incident electron kinetic energy
The energy of a Bremsstrahlung photon is:
The difference between the entering and exiting kinetic energy of the incoming electron.
Bremsstrahlung interactions may occur only when the incident electron interacts with:
The force field around the nucleus
Characteristic interactions may occur only when the incident electron interacts with:
An inner-shell electron
During a characteristic interaction, the kinetic energy of the incident electron must be ___ the electron it knocks from its orbit.
Greater than that of
During a characteristic interaction, the dropping of a higher-energy state electron into a lower-energy state “hole” results in the emission of:
A photon of electromagnetic energy
The energy of a characteristic photon is:
The difference between the binding energy of the outer and inner shells between which the electron dropped.
At the end of the characteristic cascade, the ____ shell is missing an electron.
Outermost
The K shell can hold a maximum of ___ electrons.
2
If the peak kVp is 110, the average keV energy of the beam would be:
33-44 keV
X-rays are characterized as:
- Electromagnetic waves of short wavelength
- Electromagnetic waves with high frequencies
The emission spectrum of an x-ray beam from a tungsten anode consists of:
- A characteristic spike at 69 keV
- A significant portion due to Bremsstrahlung interactions
- A mixture of brems and characteristic interactions
If Uranium were used to produce x-radiation, rather than tungsten,
- The k-shell binding energy would be _____ than with tungsten.
- The _____ of brems production would be ____.
- The _____ of characteristic photons would be ____ than with tungsten.
- The k-shell binding energy would be GREATER than with tungsten.
- The INTENSITY of brems production would be GREATER.
- The ENERGY of characteristic photons would be GREATER than with tungsten
Electrons traveling from the cathode filament to the anode are called __________
Incident electrons
When comparing the x-ray emission spectrum between beams produced at 70 kVp and 110 kVp,
The 110 kVp beam would demonstrate more brems and a higher characteristic spike.
For the element molybdenum, the effective energy of characteristic interactions it:
18 keV.
When the x-ray emission spectra between single and three phase generators are compared,
Three phase beams would have a higher average energy
