Ionisation Chamber Smoke Detectors
Ionisation chamber smoke detectors (ICSDs) contain a small americium-241 radioactive source that emits both gamma radiation and alpha particles. Added/updated: 2 October 2009
Mobile Telephony and Health Information Sheet
These webpages provide information relating to the radio waves from phones and base stations (mobile phone masts), typical exposure levels of people using phones and living near base stations and relevant scientific and policy positions. Added/updated: 19 February 2009