Electron Target Interactions Flashcards
3 Electron Target Interactions
- Anode heat
- Bremsstrahlung
- Characteristic x-ray
Acceelerated electrons
Projectile electron
ANODE HEAT
Projectile electrons interact with (1) of the target atom but do not transfer (2) to (3) them.
- outher shell electrons
- sufficient energy
- ionize
ANODE HEAT
Outer shell electrons are raised to — or higher energy levels
excited
ANODE HEAT
Outer shells electrons immediately (1) to their normal (2) with the emission of (3)
- drop back
- energy level
- infrared radiation
ANODE HEAT
Projectile electron may interact to another —
orbital electron
ANODE HEAT
— = Heat generated in the anode
Constant excitation
ANODE HEAT
Approximately (1) of the (2) of the projectile electron is converted to heat
- 99%
- kinetic energy
CHARACTERISTIC X-RAY
Projectile electrons interact with (1) of the target atom and has (2) for (3)
- inner shell electrons
- sufficient energy
- ionization
Removal of electron
Ionization
CHARACTERISTIC X-RAY
Temporary — is produced
electron void
CHARACTERISTIC X-RAY
What term is it when the outer shell eelectron fills the void?
Electron cascading/ Transition
CHARACTERISTIC X-RAY
— causes the production of characteristic x-rays
Orbital electron transition
CHARACTERISTIC X-RAY
Only (1) of (2) are useful in imaging
- K-characteristic x-rays
- tungsten
CHARACTERISTIC X-RAY
Characteristic x-rays have precisely fixed (1) and form a discrete (2)
- energies
- emission spectrum
Point of interaction of Heat and X-rays
Heat: Outer shell electron
Charaxteristic radiation: Inner shell electron
Bremsstrahlung Radiation: Nuclear force field
A device that permits the flow of current
Exposure hand switch
Differentiate the two types of exposur ehand switch
Rotor switch: supplies current to both sides of the x-ray tube, and only needs to be half pressed.
Exposure switch: Supplies electron to produce x-ray and needs to be fully pressed.
