Question text
37 During a radioactivity experiment, the background reading is 28 counts per minute. A radioactive source is placed 2cm in front of a detector which is connected to a counter. sheet detector source to counter 2 cm Counter readings are taken with and without sheets of different materials placed between the source and the detector. reading/counts type of sheet per minute no sheet 750 thin card 750 5mm thick aluminium 478 Which types of radiation are being emitted by the source? A alpha particles, beta particles and gamma rays B alpha particles and beta particles only C alpha particles and gamma rays only D beta particles and gamma rays only
37 During a radioactivity experiment, the background reading is 28 counts per minute.
A radioactive source is placed 2cm in front of a detector which is connected to a counter.
sheet
detector
source
to counter
2 cm
Counter readings are taken with and without sheets of different materials placed between the
source and the detector.
reading/counts
type of sheet
per minute
no sheet 750
thin card 750
5mm thick aluminium 478
Which types of radiation are being emitted by the source?
A alpha particles, beta particles and gamma rays
B alpha particles and beta particles only
C alpha particles and gamma rays only
D beta particles and gamma rays only
Select your answer: