Question text
38 A radioactive source is placed 2.0cm away from a Geiger–Müller (G.M.) tube that is connected to a counter. A sheet of paper is placed between the source and the G.M. tube. The count rate measured by the counter decreases to a value greater than the background radiation count rate. A sheet of aluminium replaces the paper and the count rate decreases to the background radiation count rate. What is the radiation emitted by the source? A alpha-particles (-particles), beta-particles (-particles) and gamma radiation (-radiation) B alpha-particles (-particles) and beta-particles (-particles) only C alpha-particles (-particles) and gamma radiation (-radiation) only D beta-particles (-particles) and gamma radiation (-radiation) only
38 A radioactive source is placed 2.0cm away from a Geiger–Müller (G.M.) tube that is connected to
a counter.
A sheet of paper is placed between the source and the G.M. tube. The count rate measured by
the counter decreases to a value greater than the background radiation count rate.
A sheet of aluminium replaces the paper and the count rate decreases to the background
radiation count rate.
What is the radiation emitted by the source?
A alpha-particles (-particles), beta-particles (-particles) and gamma radiation (-radiation)
B alpha-particles (-particles) and beta-particles (-particles) only
C alpha-particles (-particles) and gamma radiation (-radiation) only
D beta-particles (-particles) and gamma radiation (-radiation) only
Select your answer: