in Science The radioactive substance, Americanium… by Chirag Chauhan December 14, 2015, 1:10 pm 186 Views The radioactive substance, Americanium – 241 is used in many smoke detectors. Leave a Reply Cancel replyYour email address will not be published. Required fields are marked *Comment * Name * Email * Website By using this form you agree with the storage and handling of your data by this website. *