Atomic structure and ionising radiation

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Question 73

Easy

Figure 1 shows a Geiger-Muller (G-M) tube connected to a digital counter, used to detect radiation from an alpha ( $α\alpha$ ) emitting source. A thin sheet of paper is placed between the source and the G-M tube.

An experimental setup showing an alpha radiation source on the left, a thin sheet of paper in the middle, and a Geiger-Muller tube detector connected to a digital counter on the right. The distance between the source and the detector is small, approximately 2 cm.

With the paper in place, the counter records 32 counts in 1 minute.

The sheet of paper is then removed, the counter is reset to zero, and a new measurement is taken for 1 minute.

Explain why the new count is significantly higher than 32.

[2]

Atomic structure and ionising radiation

Question 73

Atomic structure and ionising radiation Questions

Atomic structure and ionising radiation

Question 73

Atomic structure and ionising radiation Questions