Chapter 19, Problem 19.64QP

Interpretation Introduction

Interpretation: The information regarding the injection of ${}^{165}\text{Dy}$ with certain amount of radioactivity that is used for decreasing pain and inflammation of the lining of knee joint of a person suffering from rheumatoid arthritis and a drop in radioactive count after certain time period is given. The half-life of ${}^{165}\text{Dy}$ is to be calculated.

Concept introduction: The time taken by any species to get reduced to half of its original concentration is called half-life of that species.

To determine: The half-life of ${}^{165}\text{Dy}$.