Effect of Distance on Exposure
Inverse Square Law

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  • Answer from previous page:
  • At 1 m: 4 R/hr
  • At 0.1 m: 400 R/hr

    • The Gamma camera (pictured on your left) is heavily shielded and contains a high activity gamma source used to radiograph (x-ray) metals and pipes to check for "flaws" in welds.
    • On the right is a "Pigtail" source which contains up to 100 Ci Ir-192.

    Page 107

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