Emissions from a radioactive source pass through a hole in a lead screen and into a magnetic field, as shown below.
Radiation detectors are placed at A, B and C. They give the following readings:
The radioactive source is then completely removed, and the readings become:
Explain why there are still counts being recorded at A, B, and C, even when the radioactive source has been removed, and give the reason for them being slightly different.
From the data given, deduce the type of emission being detected, if any, at A, at B, and at C when the radiation source is present.
State the reasons for your answers.
detector at A ...................................................
detector at B ...................................................
detector at C ..................................................
