Radiation Quantities and Units

Question 1

Used to describe a beam of radiation

Answer 1

Radiation Quantities

Question 2

Radiation fall into two general categories:

Answer 2

Radiation Exposure
Radiation Dose

Question 3

Radiation travelling through air
Total radiation delivered to a body

Answer 3

Radiation Exposure

Question 4

Radiation travelling through a medium
Concentration of radiation at some point or to a specific tissue or organ

Answer 4

Radiation Dose

Question 5

a measure of the amount of radiation, and therefore measures a radiation beam.

Answer 5

Radiation quantities

Question 6

Radiation quantities can be categorized into 2:

Answer 6

Radiation exposure and radiation dose

Question 7

which is a measure of the radiation that emanates from the source and delivered to a specific target. It is therefore usually measured in
air

Answer 7

Radiation exposure

Question 8

which is a measure of the concentration of radiation at a given point in matter.

Answer 8

Radiation dose

Question 9

It is a measure of the amount of radiation when the radiation interacts in a medium.

Answer 9

Radiation dose

Question 10

The removal of an orbital electron from an atom.

Answer 10

Ionization

Question 11

Produces an ion pair

Answer 11

Negatively charged electron and Positively charged ion (atom minus 1 electron)

Question 12

causes the deposition of energy to the interacting medium.

Answer 12

The removal of electron from an atom

Question 13

usually transferred to the ejected electron, and will eventually be absorb by the medium as the recoil electron undergoes a series of interaction and eventually come to rest.

Answer 13

the energy of the incident radiation

Question 14

A form of radiation with sufficient energy to excite and or ionize atoms.

Answer 14

Ionizing Radiation

Question 15

Ionizing radiation particles

Answer 15

•Gamma rays,
X-rays,
heavy charged particles,
•neutrons,
and beta particles are examples of ionizing radiation.

Question 16

Not all radiation are capable of ionization. Radiations that are capable of ionization are also called

Answer 16

Ionizing radiation

Question 17

the electromagnetic radiation, high frequency ultraviolet radiation, x-rays and gamma rays are

Answer 17

ionizing radiation

Question 18

Ionizing radiation is divided into two categories:

Answer 18

Directly Ionizing and Indirectly Ionizing

Question 19

Directly ionizing

Answer 19

Alpha and beta

Question 20

Indirectly Ionizing

Answer 20

photons and neutrons

Question 21

includes all charged particles.
These particles interact with electrons through long-range Coulombic charged-particle interactions and deliver energy to matter directly.

Answer 21

Directly ionizing radiation

Question 22

•includes x-rays, gamma rays, and all uncharged particles. They will typically interact via a transfer of energy to a single charged particle, and it is the secondary charged particle that delivers energy to the absorbing material.

Answer 22

Indirectly ionizing radiation

Question 23

unit of exposure

Answer 23

x

Question 24

unit of absorbed dose

Answer 24

D

Question 25

Unit of equivalent dose

Answer 25

H

Question 26

Unit of Activity

Answer 26

A

Question 27

It is the measure of ionization produced in air by photons.

Answer 27

Exposure

Question 28

It is a quantity of charge released during the ionization of air by passage of radiation under strictly defined conditions.

Answer 28

Exposure

Question 29

the measure of radiation that emanates from the source.

Answer 29

Exposure

Question 30

measured using ionization chamber.

Answer 30

Exposure

Question 31

Exposure is divided into two:

Answer 31

Primary standard instrument Secondary instrument

Question 32

Free air ionization chamber

Answer 32

Primary standard instrument

Question 33

Instruments designed for field use such as the Victoreen R meter.

Answer 33

Secondary instrument

Question 34

therefore created to produce the conditions necessary to measure radiation exposure. It is through the use of ionization chamber.

Answer 34

Device

Question 35

It is the instrument employed in the measurement of the exposure according to the definition of Roentgen (old unit of exposure).

Answer 35

Free Air Ionization Chamber

Question 36

the quantity of charge released during the ionization of air by passage of radiation under strictly defined conditions.

Answer 36

Roentgen

Question 37

It is generally used for calibration of secondary instruments designed for field use.

Answer 37

Free Air Ionization Chamber

Question 38

It is confined to some national standards laboratories.

Answer 38

Free Air Ionization Chamber

Question 39

the primary instrument, and is constructed based on the definition of Roentgen, which is the old unit of measure of exposure.

Answer 39

Free air ionization chamber