Moderate
Radiation from a point source obeys the inverse square law. If the count rate at a distance of 1.0m from counter is 360 counts per minute. The count rate at the distance of 3m will be:
Correct answer: B. 40 counts per minute
- A. 90 counts per minute
- B. 40 counts per minute
- C. 120 counts per minute
- D. 45 counts per minute
Explanation
The calculations give us 40 counts per minute.
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Atomic nuclei contain protons and neutrons, with nuclear size, mass defect and binding energy describing their stability. The work covers alpha, beta and gamma decay, decay equations, half-life and decay rate, along with radiation safety and medical applications such as imaging, radiotherapy and tracers.
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