27.2 Kinetics of Radioactive Decay | General Physics


Summary

The video introduces radioactive decay kinetics, discussing Decay constant Lambda, halflife, and plotting n (number of radioactive nuclei) versus time to show exponential decay. It covers the differential equation for radioactive decay, solving it through integration to obtain two interchangeable equations. The concept of halflife is defined as the time for half of the radioactive nuclei to decay, illustrated with examples and calculations of remaining mass and percentage after specified periods. The video explains calculating the Decay constant using the halflife and its relation to the natural logarithm of 1/2, applying it to determine remaining mass after a specific time period considering halflives elapsed.


Introduction to Radioactive Decay Kinetics

Introduction to the topic of radioactive decay kinetics, covering equations such as Decay constant Lambda and halflife.

Plotting of Radioactive Decay

Discusses plotting of n (number of radioactive nuclei) versus time, showing the exponential decay and the relationship of the slope to the Decay constant Lambda.

Exponential Decay Equations

Explains the differential equation for radioactive decay and how to solve it using integration, leading to two equations that can be used interchangeably.

Understanding Halflife

Defines halflife as the time taken for half of the radioactive nuclei to decay, illustrating with examples and fractions of remaining nuclei over time.

Mass and Percentage Calculations

Demonstrates how to calculate remaining mass and percentage of radioactive nuclei after a certain number of halflives, discussing different approaches using mass or percentage calculations.

Decay Constant Calculation

Explains how to calculate the Decay constant using the halflife and its relation to the natural logarithm of 1/2, providing a numerical example.

Application of Decay Constant

Applies the Decay constant calculation to determine the remaining mass of a radioactive sample after a specific time period, considering the number of halflives elapsed.

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