RAD Science week 2 packet Flashcards
3 things for x-ray production
- source of e- (filament)
- sudden acceleration (kV)
- sudden deceleration (target) only when 3rd step occurs is when radiation is produced
3 interactions in the tube
- heat (99% of reaction) dissipated)
- characteristic
- Brems
Z # of protons in the nucleus
Atomic #
the force w/which electrons are held in their orbital shells
electron binding energy
strength of binding energy is dependent on
location, closer to the nucleus, the stronger the binding force
complexity of atom, higher Z # the stronger binding energy
When electrons are sent from the cathode to anode, 3 things can take place
anode heat
characteristic radiation-only produced 70kV & ^
Bremsstrahlung radiation-maj. of beam
Tungston atom has 3 things that make it a strong binding energy
high melting put.
dissipates well
tremendous binding energy 74
as the electrons from the cathode strike the anode, only the outer shell electrons on the anode get excited and then drop back into their place, the target is not ionized
anode heat
what% of the projectile electron energy is converted to heat while only _% is used for the production of x-rays
99%
1%
when the projectile electron interacts with an inner shell electron of the atom, what is produced>
characteristic radiation
as the inner shell electron is knocked out an outer shell electron fills its place emitting
an x-ray /cascades
electron hits the k-shell and an L-shell drops in its place, an x-ray photon is the created that is _ in power to the difference in _ between the K & L shells
Characteristic cont.
the binding energy
all photons have same energy
homogenous
only x-rays produced by the K shells are of sufficient energy to be used in the
diagnostic range
Breaking or slowed down radiation
Bremsstrahlung
