An ionising radiation detector is used to measure the background count rate in a classroom where no radioactive samples are present. The counts per minute recorded over a span of time are listed in Table 10.1.
(a(i))[2]
State two sources that could produce this background radiation.
(a(ii))[1]
Explain why the readings are not identical.
(b)[4]
Calculate the half-life for the radioactive sample.
(c)[3]
Match each type of ionising radiation to its property, then join the property to its use. One connection has already been drawn.
Worked solution & mark scheme
This 10-mark question has a full step-by-step worked solution and mark scheme. One marking point: “the Earth / buildings / rocks / soil” …