Radiation Physics

Question 1

Ionizing radiation

Answer 1

Can produce ions by removing/ adding an e- to an atom

Question 2

Two groups of ionizing radiation:

Answer 2

Particulate & electromagnetic

Question 3

What is particulate radiation

Answer 3

Tiny particles of matter that possess mass & travel in straight lines & high speeds.

Question 4

What are 4 types of particulate radiation?

Answer 4

Electrons
Alpha particles- emitted from nuclei of heavy metals
Protons - accelerated hydrogen nuclei
Neutrons - accelerated particles

Question 5

Electromagnetic radiation

Answer 5

Propagation of wavelike energy, w out mass, thru space or matter

Question 6

Electromagnetic radiation examples?

Answer 6

• Man made & occur naturally (microwave, visible light)
• Arranged in electromagnetic spectrum
• can move as a particle and wave

Question 7

Particle concept

Answer 7

Characterizes electromagnetic radiation in terms of discrete bundles of energy called photons or quanta

Question 8

Wave concepts

Answer 8

Characterizes electromagnetic radiation as waves & focused on velocity, wavelength and frequency

Question 9

Cathode - negative

Answer 9

• tungsten wire filament
• supplies e- I o generate x-rays
• tungsten filament produces electrons when heated

Question 10

Anode - positive

Answer 10

• thin tungsten plate embedded in a solid copper rod
• tungsten target serves as a focal spot and converts e- into photons
• copper stem dissipates heat away from tungsten target

Question 11

Thermionic emission

Answer 11

Release of e- from tungsten filament when current is passing thru it
Outer shell e- of tungsten filament get energy to move away & form e- cloud