| 11. | Immediately, the Geiger counter in her other hand bleeps, throbbing faster and faster.
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| 12. | Nonetheless, she takes her own readings with a borrowed Geiger counter every week.
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| 13. | Items such as Geiger counters have been used in other concerts.
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| 14. | Our inspectors wear pagers that are actually small Geiger counters,
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| 15. | An inspection of the box revealed low-level radioactive material used to calibrate Geiger counters.
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| 16. | Due to their high beta activity, they can be detected by a Geiger counter.
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| 17. | Simon uses one of their Geiger counters, and discovers that the children are radioactive.
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| 18. | He carried a Geiger counter with him always in his work there, Shmotkin said.
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| 19. | Oddly, he chances upon a Geiger counter in their hotel.
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| 20. | Think of an experiment to examine radioactivity in various samples using a Geiger counter.
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