Lecture_30_112311 - Lecture 30: Radioactivity Goals:...

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Unformatted text preview: Lecture 30: Radioactivity Goals: Calculate the amount of radioisotope remaining after one or more half-lives. Describe the processes of nuclear fission and fusion. Outline (Timberlake 4.4-4.6):- Half-Life of a Radioisotope (4.4)- Medical Applications Using Radioactivity (4.5)- Nuclear Fission and Fusion (4.6) Problems for Extra Practice: 4.37, 4.41, 4.43, 4.45, 4.47, 4.51, 4.53, 4.55, 4.57, 4.59, 4.61, 4.63, 4.65, 4.67, 4.69, 4.77, 4.79, 4.81, 4.83 Summary of Types of Radiation Radiation Measurement A Geiger counter detects beta and gamma radiation uses ions produced by radiation to create an electrical current Shielding for Radiation Protection Radiation Demo Half-Life The half-life of a radioisotope is the time for the radiation level to decrease (decay) to one-half of the original value. Decay Curve A decay curve shows the decay of radioactive atoms and the remaining radioactive sample. Half-Lives of Some Radioisotopes Radioisotopes that are naturally occurring tend to have long half-lives used in nuclear medicine have short half-lives In one half-life, 40 mg of a radioisotope decays to...
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Lecture_30_112311 - Lecture 30: Radioactivity Goals:...

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