RSO Radiation Physics and Fundamentals 1

Question 1

Which type of radiation has the greatest ionizing power but the least penetrating ability?

Accepted Answer

Alpha particles

Answer

Alpha particles are highly ionizing due to their large mass and double positive charge, but they are stopped by a few centimeters of air or a sheet of paper.

Question 2

The SI unit of radioactivity is the Becquerel (Bq). One Becquerel is defined as:

Accepted Answer

One disintegration per second

Answer

One Becquerel equals one nuclear disintegration (decay event) per second.

Question 3

Which of the following best describes gamma radiation?

Accepted Answer

High-energy electromagnetic radiation

Answer

Gamma radiation consists of high-energy photons (electromagnetic radiation) emitted from the nucleus during radioactive decay.

Question 4

The half-life of a radioactive isotope is the time required for:

Accepted Answer

The activity to decrease to half its original value

Answer

Half-life is the time for the activity (number of decays per unit time) of a radioactive sample to decrease to half its initial value.

Question 5

Which nuclear process results in the emission of a positron (β+)?

Accepted Answer

Beta-plus decay

Answer

Beta-plus decay occurs when a proton converts to a neutron inside the nucleus, emitting a positron and a neutrino.

RSO - Radiation Safety Officer Practice Test

RSO - Radiation Safety Officer Practice Test

RSO Radiation Physics and Fundamentals 1