Midterm

Front 1

The heating the filament to incandescence which results in the liberation of electrons is called?

Back 1

Thermionic Emission

Front 2

The boiled off electrons that collect around the filament is called?

Back 2

Space Charge

Front 3

An electron that is removed by the heating process is called?

Back 3

Thermions

Front 4

Bits of energy are also known as _________.

Back 4

Photons

Front 5

For Heat Units what is the equation for single phase operation ?

Back 5

H.U= KVp x mA x Time

Front 6

A problem that can damage the tube is __________ .

Back 6

Spark over

Front 7

For Heat Units what is the equation for three phase, six pulse ?

Back 7

H.U. = KVp x mA x Time x 1.35

Front 8

The beam is hardened due to the greater removal of soft (low energy) than of hard (high energy) rays by _________ .

Back 8

Filter

Front 9

As that thickness of a specified metal that reduces the radiation output to one-half its initial value is called ?

Back 9

Half-value Layer

Front 10

X-rays photons that have undergone a change in direction after interacting with atoms is called ?

Back 10

Scattered Radiation

Front 11

The characteristic radiation emitted by atoms after having absorbed x-rays photons is called?

Back 11

Secondary Radiation

Front 12

When a photon of sufficient energy encounters a loosely bound outer shell electron it may dislodge the electron and proceed in a different direction is called ?

Back 12

Compton Effect

Front 13

A megavoltage photon upon approaching a nucleus, may disappear and give birth to a pair a negatron and a positron this is called?

Back 13

Pair Production