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Flashcards in Chapter 2 Deck (22)
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1

what is ionization?

the formation of ion pairs

2

particulate radiation

alpha and beta particles

3

ionizing types

x-rays
gamma rays
cosmic rays

4

photons

bundles of energy that travel through space at the speed of light

5

4 properties of energies of the electromagnetic spectrum

travel at the speed of light
have no electrical charge
have no mass or weight
pass through space as particles and in wavelike motion

6

wavelength

distance between two similar points on two successive waves

7

frequency

measure of number of waves that pass a given point per unit of time

8

velocity

refers to speed of the wave

9

5 properties of x-rays

are invisible
travel in straight lines
travel at speed of light
have no mass or weight
have no charge

10

tungsten

target metal in production of x-rays

11

4 interactions to occur when a beam of x-rays pass through matter are:

no interaction
coherent scattering
photoelectric effect
compton effect

12

coherent scattering:

when a low energy x-ray passes near an atom's outer electron

13

photoelectric effect

all or nothing energy loss

14

compton effect

causes x-rays to be scattered in all directions

15

background radiation

ionizing radiation that is always present in our environment

16

background radiation originates from what sources?

cosmic radiation from outer space (stars & sun)
terrestrial radiation from earth (uranium)
background radiation from radionuclides

17

electromagnetic radiation

movement of wavelike energy through space as a combination of electric and magnetic fields

18

amount of binding energy in a K shell

69,000 volts

19

angstrom units

1 angstrom (symbol is A w/ small circle above) is about 1/250,000,000 inches or 1/100,000,000cm

20

bremsstrahlung radiation

German for braking

21

the majority of x-rays produced by dental x-ray machines are formed by

general/bremsstrahlung radiation

22

a coulomb is

a unit of electrical charge