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Radioactive Absorption

CSEF · 2003 Physics & Astronomy

Ryan J. Honda · Ribet Academy, Los Angeles

Overview

Objectives/Goals The purpose of this experiment was to test the hypothesis that the effectiveness of radioactive shielding improved with materials of greater density, thickness, and atomic number by measuring alpha, beta, and gamma radiation penetration through aluminum and lead absorbers with varying thickness. Methods/Materials The instrument used to to measure the radiaoactive count was the Geiger-Muller Tube and Counter. Three one minute trials for each source and number of shields was performed for each type of shield. Background noise was subtracted. Results Regression lines of the date averages were plotted and compared. Gamma rays proved to be the most penetrating, followed by beta and alpha particles, respectively. Conclusions/Discussion Results confirmed the hypothesis and showed lead to be the best absorber of radiation, followed by aluminum shields, and aluminum foil.

Summary statement

This experiment tested the effects of mass absorption of radioactive substances.

Help received

Used lab and equipment at Ribet Academy

Competition history

  • CSEF 2003 Physics & Astronomy · Entry S1511

Resources

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