Problem Solutions For Introductory Nuclear Physics By

Solution: The half-life of a radioactive substance is the time it takes for half of the initial number of nuclei to decay. After one half-life, the number of nuclei remaining is 500. After two half-lives, the number of nuclei remaining is 250. After three half-lives, the number of nuclei remaining is 125.

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So, 125 nuclei will remain after 30 days. Problem: Write the equation for the nuclear reaction between a proton (¹H) and a carbon-12 nucleus (¹²C), resulting in the production of a nitrogen-13 nucleus (¹³N) and a gamma ray (γ). Solution: The half-life of a radioactive substance is

Therefore, after 30 days (three half-lives), the number of nuclei remaining is: After three half-lives, the number of nuclei remaining