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x-ray interactions

rad phyics

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	2
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	K
which energy-level electrons possess the highest total energy	N
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

Created by: reetherockgoddess

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