X-ray Production

Question 1

What happens to filament electrons after they interact with atoms?
1. Fill a shell vacancy in an atom
2. Become part of the current through the tube
3. Convert to heat
4. Disintegrates

Answer 1

1 and 2

Question 2

T/F: Only L shell electrons can fill K shell vacancies

Answer 2

False

Question 3

If an N shell electron fills an M shell vacancy, what is the energy of the photon produced?
M = 2.82 keV
N = 0.6 keV

Answer 3

2.22

Question 4

If an O shell electron fills an L shell vacancy, what is the energy of the photon produced?
L = 12.1 keV
O = 0.08 keV

Answer 4

12.02

Question 5

If filling a K shell vacancy, which shell electron would produce the highest energy characteristic photon? L, M, N, or O?

Answer 5

O shell

Question 6

T/F: Characteristic photons are produced with the filling of each shell vacancy.

Answer 6

True

Question 7

L characteristic originates from what shell being filled?

Answer 7

L

Question 8

As the distance between the filament electron and nucleus gets smaller, what happens to the brems photon energy?

Answer 8

Increases

Question 9

If a filament electron enters an atom with 70 keV of energy, passes the nucleus and leaves with 10 keV, what is produced?

Answer 9

60 kVp brems

Question 10

T/F: Brems is the interaction that occurs most often.

Answer 10

True

Question 11

Where is the discrete line placed on an x-ray emission spectrum for a tungsten target?

Answer 11

69

Question 12

T/F: Brems radiations constitutes most of the x-ray beam

Answer 12

True

Question 13

T/F: Characteristic x-rays are produced when a projectile electron interacts with an outer shell electron, and an inner shell electron fills that void.

Answer 13

False

Question 14

T/F: Most of the energy produced during the production of x-rays is heat

Answer 14

True

Question 15

A filament electron enters an atom with 70 keV of energy and passes very close to the nucleus, leaving the atom with 20 keV of energy. The energy of the brems photon produced is

Answer 15

50 keV

Question 16

An increase in kVp results in shorter:

Answer 16

wavelengths

Question 17

Electrons from the cathode slam into the anode and suddenly brake and change direction. These produce ___ x-rays

Answer 17

Bremmsstrahlung

Question 18

Changing the mA controls which of the following?
-Quantity of the x-ray beam
-Penetrating power of the x-ray beam
-Quality of the x-ray beam
-Average photon energy of the x-ray beam

Answer 18

Quantity of the x-ray beam

Question 19

Charateristic x-ray are produced by:

Answer 19

released binding energy

Question 20

Doubling the mA through an X-ray tube will roughly:

Answer 20

double the quantity of the photons produced

Question 21

X-rays are produced when:

Answer 21

Projectile electrons interact with target atoms

Question 22

Ionizing radiation occurs when:

Answer 22

Energy radiates matter and removes an orbital electron from the interacted atom.

Question 23

The number of x-rays in the useful (primary beam) is called

Answer 23

X-ray quantity/Radiation Exposure

Question 24

The quality of an x-ray beam refers to what?

Answer 24

Energy of x-rays

Question 25

Variations in radiation intensity across the tube because of the geometry of an angled anode target describes

Answer 25

the anode heel effect

Question 25

The speed/velocity of the X-ray photons in the primary beam can be controlled (can be changed) by the:

Answer 25

It cannot be changed

Question 26

Which may happen to projectile electrons when they encounter target atoms?
(1) Create heat energy
(2) Produce bremsstrahlung x-rays
(3) Produce gamma rays

Answer 26

1 and 2

Question 27

Which type of x-rays is produced with the filling of each shell vacancy in the tungsten atom?

Answer 27

Characteristic

Question 28

Leakage radiation is a form of secondary radiation and comes from what?

Answer 28

Leakage of the tube housing