Edexcel A-Level Physics Nuclear Radiation Properties

Practise Edexcel A-Level Physics nuclear radiation properties by comparing alpha, beta and gamma using absorbers, tracks, ranges and ionisation.

Exam points

identify alpha, beta or gamma radiation from absorber count-rate changes and penetration
explain cloud-chamber tracks using ionising ability, particle mass and path shape
assess radiation safety or medical suitability from range, penetration and ionisation

[Maximum number: 1]

A student investigated the absorption of gamma radiation by lead, as shown. She used an americium source.

She placed sheets of lead absorber between the source and the GM tube. She recorded the count for 2 minutes for each thickness of absorber.

Figure for Question 5.4.138 - Nuclear radiation properties question 1 — Edexcel A-Level Physics A2

Americium emits alpha radiation as well as gamma radiation.
State why alpha radiation will not affect the recorded count rate.

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5.4.138 - Nuclear radiation properties question 1