What are the differences between smoke detector ionization and photoelectric technologies, and which one is more effective in detecting smoke and fire?

Ionization smoke detectors use a small amount of radioactive material to ionize the air, while photoelectric smoke detectors use a light beam to detect smoke particles. Both technologies are effective in detecting smoke and fire, but photoelectric detectors are generally more effective at detecting smoldering fires, while ionization detectors are better at detecting fast-flaming fires. It is recommended to have both types of detectors in your home for maximum safety.