Question

1. A sample of Thallium-204 has 10 mCi of activity. The Curie (Ci) is one unit for measurement of:? a) The ability of photons to produce ionizing radiation b) Rate of radioactive events (eg. disintegrations per second) c) The amount of energy absorbed by tissue d) All of the above

2) The most important factor for determining the exposure hazard of a particular isotope is: a) Activity b) Decay energy c) Half-value year d) Physical state

3) Which type of external radiation would be considered the most hazardous, given an equal amount of activity and distance from the souce? a) An alpha source b) A beta source c) A gamma source d) All are equally hazardous

4) Which radiation is least penetrating of human skin tissue? A) Beta particle B) Alpha particle C) Gamma ray D) Xray

5) Beta particles are:

A) are emitted from the nucleus with discrete energies

B) are capable of creating bremsstrahlung radiation in materials

C) are essentially identical to a proton

D) all of the above

Answer 1