Radioactive decay, half-life and uses

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Question 35

Easy

In a manufacturing plant, a beta radiation source and a detector are used to monitor the thickness of a moving plastic film.

Diagram showing a plastic film thickness control system. A continuous sheet of plastic film moves horizontally between rollers. A radioactive beta source is positioned above the sheet, emitting radiation downwards through the plastic. A GM detector is positioned directly below the sheet to detect the transmitted radiation. The detector is connected to a digital control unit.

When the plastic film is the correct thickness, the measured count rate is 1500 counts per minute.

When the plastic film becomes thinner, the count rate increases.

Give one reason for this increase.

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Radioactive decay, half-life and uses

Question 35

Radioactive decay, half-life and uses Questions

Radioactive decay, half-life and uses

Question 35

Radioactive decay, half-life and uses Questions