Finals | Electron-Target Interaction

Question 1

Electromagnetic radiation is also capable of transferring energy to an atom by this process

Answer 1

Excitation

Question 2

Electrons in an atom are moved to a higher energy state without actually being removed from the atom

Answer 2

Excitation

Question 3

Process of adding or removing an electron from an atom

Answer 3

Ionization

Question 4

Total number of ion pairs produced by both primary and secondary ionization events per unit of track length along a charged particle track.

Answer 4

Specific ionization (S.I.)

Question 5

The energy of motion

Answer 5

Kinetic Energy

Question 6

Kinetic Energy Symbol

Answer 6

KE

Question 7

Kinetic Energy Unit

Answer 7

Joules (J)

Question 8

Kinetic Energy Formula

Answer 8

KE= (1/2)mv^2

Question 9

Electrons travelling from cathode to anode

Answer 9

Projectile Electron

Question 10

It interacts with the orbital electrons or nuclear field of target atoms

Answer 10

Projectile Electron

Question 11

Projectile electron interacts with the (1) or (2) of (3)

Answer 11

1. orbital electrons
2. nuclear field
3. target atoms

Question 12

Three Effects of Projectile Electron

Answer 12

o Production of heat
o Formation of characteristics x-rays
o Formation of bremsstrahlung x-rays

Question 13

Reasons for anode heat

Answer 13

Constant excitation & return of outer-shell electrons

Question 14

Increases directly with increasing x-ray tube current & kVp

Answer 14

Anode Heat

Question 15

Relations under anode heat

Answer 15

↑ AH, ↑ mA (Current)
↑ AH, ↑ kVp (Voltage)

Question 16

Efficiency of X-ray Production

Answer 16

*It is independent of the tube current
*It increases with increasing kVp

Question 17

Emitted when an outer-shell electron fills an
inner-shell void

Answer 17

Characteristic Radiation

Question 18

An interaction with the inner-shell of a target atom

Answer 18

Characteristic Radiation

Question 19

X-rays resulting from electron transition to the K shell

Answer 19

K X-rays

Question 20

X-rays resulting from electron transition to the L shell

Answer 20

L X-rays

Question 21

Only x-rays useful for imaging

Answer 21

K-characteristic x-rays of tungsten

Question 22

It is produced when a projectile electron is slowed by the nuclear field of a target atom nucleus

Answer 22

Bremsstrahlung Radiation

Question 23

An interaction with the nuclear field of a target atom

Answer 23

Bremsstrahlung Radiation

Question 24

What bremsstrahlung radiation is also known as

Answer 24

“slowed down radiation”

Question 25

It results from braking of projectile electrons by the nucleus

Answer 25

Bremsstrahlung Radiation

Question 26

It results when the projectile electrons loses all its KE & simply drifts away from the nucleus

Answer 26

High-Energy Bremsstrahlung X-ray

Question 27

It results when the
projectile electrons are
barely influenced by the
nucleus

Answer 27

Low-Energy Bremsstrahlung X-ray

Question 28

Source of scattered radiation

Answer 28

patient

Question 29

Source of leakage radiation

Answer 29

protective housing

Question 30

Source of useful beam

Answer 30

window