Uses of Radiation 0.0 / 5 ? PhysicsRadioactivityGCSEAQA Created by: asho glenoCreated on: 10-04-15 11:48 Smoke Detectors usually contain a... small radioactive source 1 of 13 This emits a stream of... highly ionising alpha particles 2 of 13 An electronic detector attracts the ions and... and measures how many are being produced by detecting them as a current 3 of 13 It absorbs many of the ions and this... reduces the ionisation current 4 of 13 If the drop is large, due to thick smoke for e.g.... the siren sounds 5 of 13 Certain radioactive isotopes can be inserted into our... bodies 6 of 13 Their progress around are bodies can be followed by using an... external detector 7 of 13 Iodine-131 is absorbed by the... thyroid gland 8 of 13 But it gives out radiation which can be detected to... indicate whether the gland is taking in the 9 of 13 All isotopes taken into the body must be... GAMMA OR BETA emitters so that the radiation passes out of the body and the radioactivity inside the body disappears 10 of 13 Since high doses of gamma rays kill... all living cells, they can be used to treat cancers 11 of 13 They have to be directed carefully and at... the right dosage so that you don't kill normal cells too 12 of 13 A fair bit of damage can be done to the... normal cells which makes the patient ill 13 of 13
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