CHE101_Module08_Lab.docx - CHE101 Module 8 Lab Radiation Part I 1 What was the level of background radiation you observed When the Geiger counter was

CHE101_Module08_Lab.docx - CHE101 Module 8 Lab Radiation...

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CHE101 Module 8 Lab: Radiation Part I 1. What was the level of background radiation you observed? When the Geiger counter was placed on the workbench, the readout was 40. 2. What are some of the sources of background radiation? There are low levels of radioactive isotopes almost everywhere such as in soil and the air. Cosmic radiation from stars, supernovas, nebulae, etc. which emit radioactive isotopes also contribute to background radiation. Even though the atmosphere protects us from most cosmic radiation, some of it still gets through. Part II 1. Record the radiation emitted from each of the materials. Subtract the background count to obtain the radiation emitted by the source alone. For example, if your background radiation is 32 cpm and the radiation that you measured from the α particles is 1,632, the actual radiation emitted by the source is 1,600. Recorded Radiation (cpm) Radiation of the source without the background (cpm) a α particles 1648.0 1608.0 b β particles 16340.0 16300.0 c γ rays 2034.0 1994.0 d Lantern mantle 8040.0 8000.0 e Fiestaware 122.0 82.0
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