A physicist is investigating the decay rate of a newly synthesized short-lived radioisotope in a laboratory.
Before initiating the experiment, the physicist measures the background radiation rate in the laboratory. Explain how this background measurement must be used to analyze the experimental data.
Define the term half-life as applied to a radioactive substance.
The graph shows the variation of the corrected activity of the sample over time.
Use the graph to determine the half-life of this radioisotope.
The physicist records a new reading of the activity every 10 seconds. Suggest why such frequent readings are necessary in this investigation.
