Atomic Physics Google Play www.pkseripros.com Nuclear Physics

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Across
  1. 1. Besides death, ___________ is a very serious effect of very high levels of radiation exposure.
  2. 2. _____________ -131 is the most common type of radioisotope therapy.
  3. 6. A supersaturated vapor of water or alcohol chamber used for visualizing the passage of ionizing radiation.
  4. 8. Natural or artificial ionizing radiation in an environment, not due to deliberate introduction.
  5. 11. Material used to minimize exposure to radioactive materials in hospitals and nuclear plants.
  6. 14. The time take for half of the unstable nuclei of a sample of radioactive material to decay.
  7. 15. T1/2 = 0.693/λ: what does the symbol mean?
Down
  1. 1. To determine the age of a fossil from the carboniferous period, use __________ .
  2. 3. The SI unit of activity is the___________.
  3. 4. Spontaneous and random means that is ________ to predict when a particular nucleus will decay, but it is possible to estimate the probability of decay if the half-life is known.
  4. 5. Device that produces visual and audible signals when ionizing radiation is detected.
  5. 7. A hollow tune for detection of nuclear radiation.
  6. 9. Spontaneous disintegration of the atomic nuclei leading to the emission of ionizing radiation or particles.
  7. 10. A substance, microorganism, virus, prion or toxin that poses a threat to humans and other living organisms.
  8. 12. Most common radioactive substance that can enter basements of homes in the USA through cracks and crevices becoming a health hazard.
  9. 13. Which of the three types of radioactive emissions is not a particle?