X-ray Production II Flashcards
How efficient is the kinetic energy of the projectile electron in an x-ray tube?
About 1% efficient in the production of x-rays
The shift of the characteristic x-ray spectrum to higher energy occurs because of what?
An increase in target atomic number
How are useful characteristic x-rays produced in tungsten?
By the removal of k-shell electrons
What is produced when the projectile electron excites an outer shell electron?
Heat
The energy of characteristic x-rays increases with increasing the what?
Atomic number of target material
When are x-rays produced?
When the projectile electrons interact with target atoms
Characteristic x-rays are characteristic of the target _____.
Z# (atomic number)
When a tungsten targeted x-ray tube is operated at 68 kVp, can K shell characteristic x-rays be produced?
No
When characteristic x-rays are produced, what is the energy characteristic of?
The atomic number of the target
What is the kinetic energy of a projectile electron measured in?
Joules
The efficiency of x-ray production is ________ of tube current.
Independent
What is Brems radiation produced by?
The conversion of projectile electron kinetic energy to electromagnetic energy
When a Brems x-ray is produced, a projectile electron ____ its energy
Loses
In Brems x-ray production, the projectile electron is from the ______.
Cathode
If an average radiographic technique is used, most x-rays are ______.
Brems
Brems x-rays are produced only at:
Energies up to the projectile electron energy
What would happen if a radiographic technique in a tungsten target at 60 kVp 80 mAs is changed to 80 kVp @ 80 mAs?
The number of x-rays produced increases
In a tungsten targeted x-ray tube, are there more Brems x-rays or characteristic x-rays?
Brems
When a Brems x-ray is emitted, this results from the conversion of _____ ______.
Kinetic energy
The wavelength of an x-ray becomes _____ as projectile electron kinetic energy is reduced.
Longer
When projectile electron energy is increased ____ Brems x-rays are produced.
More
The efficiency of Brems x-ray production increases with increasing…
Target atomic number
The output intensity of an x-ray tube is primarily due to ______ x-rays.
Brems
What type of projectile electron target interactions result in x-ray emission?
Removal or inner shell electrons
