radiation

Question 1

what is activity?

Answer 1

the number of radioactive transformations per second that occur in a particular radionuclide

Question 2

what is count rate and how is it measured?

Answer 2

Count-rate is the number of decays recorded each second by a detector

Question 3

what are alpha beta and gamma radiation the best for a given job?

Answer 3

alpha is the most ionising, least penetrating, can be stopped by a piece of paper

beta is moderately ionising, moderately penetrating, can be stopped by a few mm of aluminium foil

gamma is least ionising, most penetrating, can be stopped by several metres of concrete or lead

Question 4

how can we protect from radiation?

Answer 4

irradiation = lead clothes
contamination = radiation suit

Question 5

what is background radiation and what are its sources?

Answer 5

Naturally occurring radioactive minerals in the ground, soil, and water produce background radiation.

Question 6

what is radiation dose measured in?

Answer 6

Sieverts

Question 7

how do the hazards associated with radioactive material differ according to the half-life?

Answer 7

If a substance has a short half life it, it will release its radiation much more quickly and this can be dangerous as it will release a lot of radiation in a short amount of time

Question 8

how is unclear radiation used in medicine?

Answer 8

to see how organs or tissue are functioning (for diagnosis) or to target and destroy damaged or diseased organs or tissue (for treatment).