Radiation Safety Practice Exam

What happens to the negatively charged electron when an ion pair is created?

1. It is released into the atmosphere

2. It is attracted to the anode

3. It remains in the detector

4. It is expelled from the instrument

The correct answer is: It is attracted to the anode

When an ion pair is created, it consists of a positively charged ion and a negatively charged electron. In the context of detectors used in radiation safety, the negatively charged electron becomes attracted to the anode. This attraction occurs because the anode is typically positively charged, creating an electric field that directs the negatively charged electrons towards it. This movement is essential for the operation of many detectors, as the collection of those electrons contributes to the electrical signal that indicates the presence of ionizing radiation. Understanding this mechanism is crucial because it highlights the fundamental process by which radiation is detected: the generation of ion pairs and the subsequent movement of charged particles in response to electric fields. This principle allows instruments to effectively measure radiation levels and ensure safety protocols are followed.