a small amount of americium - 241 is used in smoke detectors. a stream of radiation flows between two…

a small amount of americium - 241 is used in smoke detectors. a stream of radiation flows between two electrodes. if smoke interrupts the stream, the alarm goes off. what feature of the radioisotope americium - 241 would be most helpful for the smoke detector to work?\no long half - life\no short half - life\no over - sensitive detection\no less sensitive detection

a small amount of americium - 241 is used in smoke detectors. a stream of radiation flows between two electrodes. if smoke interrupts the stream, the alarm goes off. what feature of the radioisotope americium - 241 would be most helpful for the smoke detector to work?\no long half - life\no short half - life\no over - sensitive detection\no less sensitive detection

Answer

Brief Explanations:

Smoke detectors need a consistent radiation source. A long - half - life radioisotope like americium - 241 will emit radiation steadily over a long time, ensuring the detector works reliably for years without the need for frequent replacement of the radioactive source. Short - half - life isotopes would decay too quickly, and over - sensitive or less - sensitive detection are not features of the radioisotope itself but of the detector's electronics.

Answer:

long half - life