rad phyics

Quiz yourself by thinking what should be in each of the black spaces below before clicking on it to display the answer.

Help!

Question

Answer

a photoelectron

is matter, possesses energy, is capable of creating biological changes

🗑

almost all the kinetic energy of the incident electrons is converted to

heat

🗑

an interaction that occurs between low energy x-ray photons and matter is called___ scatter

coherent, classical, unmodified

🗑

as the angle of deflection is increased from 0 to 180 degrees

greater energy is imparted to the recoil electron

🗑

as the electrons shell move farther from the nucleus, total electron energies___ and binding___ energies

increase, decrease

🗑

at the end of the characteristic cascade, the ___shell is missing an electron

outermost

🗑

brems interactions may occur only when the incident electron interacts with

the force field of the nucleus

🗑

characteristic interactions may occur only when the incident electron interacts with

an inner-shell electron

🗑

compton scattering occurs whrn an incident x-ray photon interacts with a___electron

loosely bound outer-shell

🗑

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 energy

🗑

during a characteristic interaction, the energy of the incident electron must be___the elcrton it knocks from its orbit

greater than that of

🗑

during coherent scattering, the scattered photon possesses___as the incident photon

the same energy, the same frequency, and the same wavelength

🗑

during compton scattering, the incident photon energy is divided between the

ejected electron and the scattered photon

🗑

during photoelectric absorption, an___ shell electron is ejected

inner

🗑

during photoelectric absorption, the ejected electron is called a

photoelectron

🗑

during the photoelectron interaction, as an electron transfers from an outer shell to a vacant inner shell, energy is released in the form of

a characteristic photon

🗑

during the process of attenuation, the x-ray photon may interact with

the nucleus, the entire atom, an orbital electron

🗑

during the process of attenuation, x-ray photons in the beam

reduce in number, lose energy, interact

🗑

during which interaction with matter is the x-ray photon converted to matter in the form of two electrons

pair production

🗑

if a photon interacts with matter and scatters, the photon

exists with less energy

🗑

in the human body, ___is the predominant interaction through most of the diagnostic x-ray range

compton scattering

🗑

in which element are inner-shell electrons more tightly bound to the nucleus

lead(Z=82)

🗑

in which process is matter converted back to energy

annihilation reaction

🗑

secondary radiation energies are highest for which element

barium

🗑

the electron dislodged during compton scattering is called the

recoil electron

🗑

the energy of a brems photon is

the difference between the binding energy of the outer and inner shells between which the electron dropped

🗑

the K-shell can hold a max of ___electrons

🗑

a photon that exists the atom after a compton scattering is called the comptom

scattered photon

🗑

the transfer of the incident electron's kinetic energy to the out-shell electrons causing vibration of the out-shell electron results in the emission of

infrared radiation

🗑

the types of target interactions that occur in the production of diagnostic range x-ray photons are dependent upon

electron kinetic energy

🗑

unwanted densities caused predominantly by scattered photons are called

radiation fog

🗑

what percentage of target interaction results in the production of x-rays

1 percent

🗑

when an electron from an outer shell fills a vacancy in an inner shell

more than one of the above

🗑

when an x-ray passes trough matter, it undergoes a process called

attenuation

🗑

when an x-ray photon with a slightly greater energy than the binding energy of the inner-shell electron interacts with that inner-shell electron, the following interaction results

photoelectron absorption

🗑

when x-ray photons interact with matter and change direction, the process is called

scatter

🗑

which atomic shell possesses the highest binding energy

🗑

which energy-level electrons possess the highest total energy

🗑

which of the following interactions has a significant impact on the x-ray image

photoelectric absorption

🗑

which of the following interactions has a significant impact on the x-ray image

compton scattering

🗑

which of the following interactions with matter results in a radiograph with a long scale of contrast

compton scattering

🗑

which of the following interactions with matter results in a radiograph with a short scale of contrast

photoelectric interactions

🗑

a photoelectric interaction is more likely to occur when the x-ray photon energy and the electron binding energy are farther from one another

false

🗑

a photoelectric interaction is more likely to occur with an electron that is loosely bound in its orbit than with an electron that is tightly bound

false

🗑

as kVp increases, the percentage of compton interactions decreases

false

🗑

as kVp increases, the total number of photons transmitted without interaction increases

true

🗑

as the atomic number of an element increases, the energy required to remove an inner-shell electron decreases

false

🗑

as the kinetic energy of the incident electron increases, so does the efficiency of the photon production

true

🗑

during coherent scattering, the scatterd photon differs from the initial photon in direction

true

🗑

during pair production, the negatively charged electron is termed a negatron

true

🗑

during photoelectric interaction, the incient x-ray photon must be greater than the binding energy of the inner-shell electron

true

🗑

in a brems interaction, the closer the incident electron travels to the nucleus, the lower the energy of the resultant x-ray photon

false

🗑

in the diagnostic range, the kinetic energy of the incident electrons is high enough to eject an outer-shell electron causing ionization

true

🗑

photodisintergration is extremely relevant in diagnostic imaging ranges

false

🗑

some x-ray photons may pass through matter and not interact with that matter at all

true

🗑

the creation of a characteristic photon in the diagnostic range is always the result of a K-shell electron ejection

true

🗑

the creation of a characteristic photon is always the result of a K-shell electron ejection

false

🗑

the electron ejected during a characteristic interaction is also known as the x-ray photon

false

🗑

when a photon is absorbed, all of the energy is transferred to the matter

true

🗑

when a photon is absorbed, it no longer exists

true

🗑

when a scattered photon is defleted back toward the source, it is traveling in the direction opposite to the incident photon and is called backscatter radiation

true

🗑

Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.

To hide a column, click on the column name.

To hide the entire table, click on the "Hide All" button.

You may also shuffle the rows of the table by clicking on the "Shuffle" button.

Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.

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

Created by: reetherockgoddess