On the left, a custom-built system equipped with an alpha particle detector is used for the measurement of radon. On the right, a filter from the radon detector. The dark material on the filter is an accumulation of dirt carried in the sampled air.
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On the left, a custom-built system equipped with an alpha particle detector is used for the measurement of radon. On the right, a filter from the radon detector. The dark material on the filter is an accumulation of dirt carried in the sampled air. |