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Define disintegration constant and mean life of a radioactive substance. Give units for each.

Important Questions on Nuclei

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Gamma Question Bank for Medical Physics>Chapter 30 - Nuclei>Assignment>Q 11
Define half-life of a radioactive substance.
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Gamma Question Bank for Medical Physics>Chapter 30 - Nuclei>Assignment>Q 12

What are α-particles?

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Gamma Question Bank for Medical Physics>Chapter 30 - Nuclei>Assignment>Q 17
What are thermal neutrons?
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Gamma Question Bank for Medical Physics>Chapter 30 - Nuclei>Assignment>Q 26
  A neutron is absorbed by a Li36 nucleus with the subsequent emission of an alpha particle.
    Write the corresponding nuclear reaction.
 
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Gamma Question Bank for Medical Physics>Chapter 30 - Nuclei>Assignment>Q 27
If the activity of a radioactive substance drops to 18th of initial value in 30 years. Finds its half life.
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Gamma Question Bank for Medical Physics>Chapter 30 - Nuclei>Assignment>Q 1
Two nuclei which are not identical but have the same number of nucleons represent
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Gamma Question Bank for Medical Physics>Chapter 30 - Nuclei>Assignment>Q 2
The nuclei  A613 and  B714 can be described as
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Gamma Question Bank for Medical Physics>Chapter 30 - Nuclei>Assignment>Q 3
The nuclear radius as compared to the atomic radius is of the order