Radiation Physics Chapters 7 & 12

21 terms by vlucas

Create a new folder

Advertisement Upgrade to remove ads

In a characteristic interaction, an x-ray photon results when:

An outer shell electron fills a hole left by an ejected inner shell electron

When a ______________________ occurs, the incident electron interacts with the force field of the nucleus:

Bremsstrahlung Interaction

The energy of a characteristic photon depends on the:

Difference of binding energies of the two shells involved

In a bremsstrahlung interaction, the emission of a photon is caused by:

The deceleration of the electron as it nears the nucleus

It is necessary for the incident electron to have higher energy than the K-shell electrons in order for this interaction to occur:

Characteristic

The principle difference between an x-ray photon and a gamma ray is the:

Origin of the photon

The energy of the photons produced in bremsstrahlung x-ray production is dependent on:

Incident electron speed
Atomic # of target
Electron to nucleus distance

Approximate percentage of electron energy that is converted to x-ray energy in the x-ray tube?

1%

Approximate percentage of Kenetic Energy converted into thermal energy 'heat'?

99%

Explain the difference between keV and kVp

keV: Unit of measure of binding energy of an electron
Kvp: controls the quality of electrons striking the target

keV

1,000 electron volts

What effect does increasing the mAs have on the total x-ray emission spectrum?

Changes in Amplitude

What effect does increasing the kVp have on the total x-ray emission spectrum?

Changes the Amplitude and the Number of Photons

X-rays are produced when a high-speed electron from the _____ hits the _____ target.

Cathode / Anode

An Incident Electron travels from zero to half the speed of light in:

2 cm

Higher Mass or Speed of the Incident Electron =

Higher quality & quantity of Photons produced.

Two types of Target Interactions:

Heat & X-ray production

The production of X-ray is very ________.

Inefficient

In _______ the majority of energy is converted into radiation instead of heat.

Therapy

Two types of target interactions that cause radiation:

Bremsstrahlung / Characteristic

Graph of X-ray energies

Spectrum

Please allow access to your computer’s microphone to use Voice Recording.

Having trouble? Click here for help.

We can’t access your microphone!

Click the icon above to update your browser permissions above and try again

Example:

Reload the page to try again!

Reload

Press Cmd-0 to reset your zoom

Press Ctrl-0 to reset your zoom

It looks like your browser might be zoomed in or out. Your browser needs to be zoomed to a normal size to record audio.

Please upgrade Flash or install Chrome
to use Voice Recording.

For more help, see our troubleshooting page.

Your microphone is muted

For help fixing this issue, see this FAQ.

Star this term

You can study starred terms together

NEW! Voice Recording

Create Set