Chapter 21, Problem 21.70QP

Interpretation Introduction

Interpretation: The information regarding the balloon angioplasty for unclogging arteries in patients suffering from arteriosclerosis and the use of Iridium $-192$ therapy as a treatment for the prevention of reclogging of the arteries is given. The time taken for the disappearance of $99\%$ of the radioactivity from the given amount of ${}^{192}\text{Ir}$ 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 time taken for the disappearance of $99\%$ of the radioactivity from the given amount of sample.