A medical physicist is preparing a high-activity cobalt-60 source to calibrate a stereotactic radiosurgery machine.
State one safety precaution, other than wearing personal protective equipment (such as a lead apron), that the physicist should take to minimise their radiation exposure during this procedure.
94 exam-style questions on Edexcel GCSE Physics 6.5 Uses and dangers of radioactivity. Each one has a worked solution and a mark scheme showing where the marks go.