Plan a school-safe investigation into how absorber thickness affects count rate from a sealed beta source.

Question

Accepted Answer

Keep source-detector geometry fixed, measure background, add absorber layers with tongs, count for equal long intervals, correct rates and graph corrected count rate against thickness. Clamp source and detector at a fixed separation and record a background count over a suitable interval. Without touching the source, add measured absorber thicknesses and count for the same sufficiently long time. Repeat or use long counts to reduce fractional random uncertainty, subtract background and graph corrected rate. Apply time-distance-shielding rules, use tongs and return the sealed source immediately to secure storage under teacher control.

Shielding attenuation inquiry

Plan a school-safe investigation into how absorber thickness affects count rate from a sealed beta source.

What a complete response should do

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