An apparatus is used to determine the nature of the emissions from a radioactive source in a vacuum. Different absorbers can be placed between the source and the detector.

The table shows the results obtained with this apparatus:

Absorber in use	Count rate on detector (counts per second)
None	600
Thin paper	250
1.0 mm aluminium	250
1.0 cm lead	20

Which types of radiation are being emitted by the radioactive source?

$α\alpha$ -particles and $β\beta$ -particles

$α\alpha$ -particles and $γ\gamma$ -rays

$β\beta$ -particles and $γ\gamma$ -rays

$α\alpha$ -particles only

An apparatus is used to determine the nature of the emissions from a radioactive source in a vacuum. Different absorbers can be placed between the source and the detector.

The table shows the results obtained with this apparatus:

Absorber in use	Count rate on detector (counts per second)
None	600
Thin paper	250
1.0 mm aluminium	250
1.0 cm lead	20

Which types of radiation are being emitted by the radioactive source?

$α\alpha$ -particles and $β\beta$ -particles

$α\alpha$ -particles and $γ\gamma$ -rays

$β\beta$ -particles and $γ\gamma$ -rays

$α\alpha$ -particles only

5.2.2a Alpha, beta and gamma emission

Question 102

Markscheme

5.2.2a Alpha, beta and gamma emission

Question 102

Markscheme

5.2.2a Alpha, beta and gamma emission

Question 102

5.2.2a Alpha, beta and gamma emission Questions

5.2.2a Alpha, beta and gamma emission

Question 102

5.2.2a Alpha, beta and gamma emission Questions