Physics 0.0 / 5 ? PhysicsRadioactivityEquations and FormulaeIGCSECIE Created by: pheebs15Created on: 26-04-15 11:07 what types of radiation are there ? there are 3 types - Alpha, Beta & Gamma 1 of 7 What is used to detect ionisation ? The Geiger-muller tube which is attached to a Geiger counter 2 of 7 The most penetrating radiations in order of penetration Alpha is absorbed by a thin sheet of paper, Beta by a few millimetres of aluminium & Gamma is not even totally absorbed by several centimetres of lead 3 of 7 when do radioactive emissions occur ? they occur RANDOMLY 4 of 7 Time taken for the number of atoms in a sample to halve is called ? The HALF-LIFE 5 of 7 What is the unit for number of atoms decaying per unit time ? It is measured in units called the Becquerel 6 of 7 What is 1 Bq equal to ? 1 Bq is equal to 1 count per second 7 of 7
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