Emissions from a radioactive source pass through a hole in a lead screen and into a magnetic field, as shown in the diagram.

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:

a. 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.

b. 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.

Transcribed Image Text:

radioactive x •A magnetic field into paper source X • B В lead screen - X X •C 3 cm