PERSONNEL MONITORING DEVICES

Question 1

In occupational radiation monitoring, It is required when there is any likelihood that an individual will receive more than ______ of the recommended dose limit.,

Answer 1

1/10

Question 2

THE OCCUPATIONAL RADIATION MONITOR OFFERS what?

Answer 2

no protection against exposure

Question 3

Where are active dosimeters used?

Answer 3

hazardous environments like a nuclear reactor or other places with a high chance at higher radiation levels

Question 4

Active dosimeters are designed to what?

Answer 4

let the wearer know how much radiation they have been exposed and are often equipped with a notification feature to let you know when you are approaching a pre-set limit of radiation exposure

Question 5

two types of active dosimeters?

Answer 5

Electronic Personal Dosimeters

Pen Dosimeters

Question 6

What are passive dosimeters?

Answer 6

Used when you are exposed to only low radiation levels, or only occasionally exposed to radiation

Question 7

Passive dosimeters records what?

Answer 7

records the amount of radiation over time but is not analyzed in real-time

Question 8

Where are passive dosimeters used?

Answer 8

Used in hospitals by personnel who are exposed to low level of radiation.

Question 9

Aside from hospitals, who else uses passive dosimeters?

Answer 9

miners

Question 10

Generally used in Diagnostic radiology. It is similar to dental radiographic film and sandwiched between metal filters inside a plastic hold

Answer 10

Film badge

Question 11

What are the 2 metal filters of film badge and what do they do?

Answer 11

Aluminum and Copper

allows estimation of the xray energy

Question 12

advatages of using film badge?

Answer 12

Inexpensive, Easy to handle, easy to process, and reasonably accurate

Question 13

Disadvantages of using film badge?

Answer 13

can’t read exposures less than 10 mR, It cannot be reused, It can’t be worn for longer than 1 month because of possible fogging caused by temperature and humidity.

Question 14

What mineral is used in a TLD?

Answer 14

Lithium flouride in a crystalline form

Question 15

What does TLD mean?

Answer 15

Thermolumiscient dosimeter

Question 16

When exposed to xrays, what happens to the TLD?

Answer 16

the TLD absorbs energy and stores it in the form of excited electrons

Question 17

Who experimented with some thermoluminiscent materials and were able to show that exposure to ionizing radiation caused some materials to glow particulary brightly when subsequent heated?

Answer 17

Cameron and coworkers at the University of Wisonsin

Question 18

When did Cameron and his colleagues did the experiment?

Answer 18

1960s

Question 19

advatages of using TLD?

Answer 19

more sensitive and accurate than Film Badge, It can measure as low as 5 mR, and It can be worn for intervals up to 1 year

Question 20

Disadvatages of using TLD?

Answer 20

Expensive than Film Badge.

Question 21

What does OSL mean?

Answer 21

Optically Stimulated Luminiscence

Question 22

When is light emitted from the OSL?

Answer 22

Light is emitted when an OSL crystal is illuminat

Question 23

OSL is developed by and when?

Answer 23

Landauer 1990s

Question 24

What mineral is used in the OSL?

Answer 24

Aluminum Oxide

Question 25

advatages of using OSL?

Answer 25

can measure as low as 1 mR

Question 26

Disadvatages of using OSL?

Answer 26

Expensive than TLDs and Film Bad