Why are Smoke Detectors Radioactive? And How do Smoke Detectors Work?

Intensely Radioactive Industrial Smoke Detector from the 1950's

Q&A do smoke alarms have radioactive material in them?

Extraction of Americium 241 from Smoke Detector (Revisited)

Why Did These Have Radioactive Material Added?

How Much Radiation Was I Exposed Too

Radioactivity in Smoke Detectors

Radioactive Cores from Industrial Smoke Detectors

Radioactive Smoke Detectors - Americium-241

is a smoke detector RADIOACTIVE? (yes, but small amounts of radiation)

There are two types of smoke alarm. One of 'em ain't so good.

Alpha Particle Source (Am-241) from Smoke Detectors

Have you ever measured the Nuclear Radiation from your smoke detector?

Testing Americium in the Smoke Detector! - Nuclear Chemistry

Comparison: Most Radioactive Things

Some Interesting Smoke Detectors -- Ionization with Radioactive Material

What are your thoughts on radioactive material releases from nuclear facilities?

Smoke Alarm Facts: "Ionization vs Photoelectric"

Radioactive Items in a Household and Everyday Life

P6.5 How dangerous are radioactive materials