Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Rad Prot Unit 1

Bushong 8.1-3

The kinetic energy of the projectile electron in an x-ray tube is how efficient in the production of x-rays? 1% efficient in the production of x-rays
Useful characteristic x-rays are produced in tungsten: By the removal of K-shell electron
An L-shell electron (26keV) is removed from an atom with the M-shell of 4keV and N-shell of 1keV. If a free electron fill the vacancy in the L-shell, the characteristic x-ray produced will have the energy of: 26 keV
The energy of characteristic x-rays increases with increasing: Atomic number of target material
X-rays are produced when: Projectile electrons interact with target atoms
Characteristic x-rays: Are characteristic of target Z
When a tungsten-targeted x-ray tube is operated at 68kVp: K-shell characteristic x-rays cannot be produced AND some projectile electrons may have 68keV of energy
According to the table on page 111: tungsten has a greater number of electrons than molybdenum (more energy levels=more electrons)
When characteristic x-rays are produced, the energy is characteristic of: (2) The atomic number of the target AND the electron binding energy
Gold is the target material: K=81, L=14, M=3, N=1. What is the characteristic x-rays that would be produced at 90kVp? 67 keV (81-14=67)
The KINETIC energy of a projectile electron can be measured in? Joules
The efficiency of x-ray production is independent of? Tube current
In a tungsten-targeted x-ray tube operated at 90kVp, the MOST abundant x-ray would be a? 30 keV Brems x-ray
Which of the following electron transitions result in the MOST useful bremsstrahlung x-ray? 1. L to K ; 2. M to K ; 3. M to L; 4. O to K ; 5. None of the above 5. None of the above
Bremsstrahlung radiation is produced by: Conversion of projectile electron's kinetic energy to electromagnetic energy
When a Bremsstrahlung x-ray is produced the projectile electron loses? Energy
In Bremsstrahlung x-ray production, the projectile electron is from the ___________. Cathode
If an average radiographic technique is used most x-rays are? Bremsstrahlung
Bremsstrahlung x-rays are produced only at energies up to? Energies up to the projectile electron energy
If radiographic technique is 74kVp/80mAs: Bremsstrahlung x-ray energy increases if the voltage is increased to 84kVp
If radiographic technique in a tungsten target at 60kVp/80mAs is changed to 80kVp/80mAs: The number of x-rays produced increases
Brems x-rays produced in a tungsten targeted x-ray tube outnumber?: Outnumber characteristic x-rays
When a bremsstrahlung x-ray is emitted...it is the result of? Results from the conversion of kinetic energy
The wavelength of an x-ray becomes longer as? Becomes longer as the projectile electron kinetic energy is reduced
When a projectile electron energy is increased, more _________ are produced More Bremsstrahlung x-rays are produced
The efficiency of bremsstrahlung x-ray production increases with increasing _______ Target atomic number
The output intensity of an x-ray tube is (primarly due to ____________)? Primarily due to bremsstrahlung x-rays
Removal of what, in projectile-target interactions will result in emission of x-rays? Removal of inner-shell electrons
When a projectile electron enters a target atom and interacts with the nuclear force field (what happens to the velocity): It decreases in velocity
The area under the curve of the x-ray emissions spectrum represents: The total number of x-rays
Normally the x-ray emissions spectrums contains: Both characteristic and bremsstrahlung x-rays
The characteristic x-ray emission spectrum principally depends on what? Target material
what factor explains the low number of x-rays produced at low energy? Added filtration
The x-ray emission spectrum represents: X-rays emitted from the x-ray tube
A diagnostic x-ray beam contains: Mostly bremsstrahlung x-rays, and some characteristic x-rays
What factor principally accounts for the reduced x-ray intensity at low energy? Added filtration
Created by: foster1317