Lecture_Notes_103009b

Lecture_Notes_103009b - Dating by Radioactivity Carbon...

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Dating by Radioactivity y Carbon Dating – takes advantage of the decay of carbon-14 which has a half-life of 5730 years y What percentage of C-14 (t 1/2 = 5730 years) remains in a sample estimated to be 16,230 years old?
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Practice y Radiocarbon measurements made in 1988 on the Shroud of Turin, a religious artifact thought by some to be the final shroud of Jesus, showed a 14 C decay rate if 14.2 disintegrations/min per gram of carbon. What is the age of the shroud if currently living organisms decay at a rate of 15.3 disintegrations/min per gram of carbon? The half-life of 14 C is 5730 years.
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Medical Applications of Radioactivity y Radiotracers –radioactive nuclides that can be introduced into an organism and whose pathway can be traced by monitoring their radioactivity.
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Circulatory system 14.8 hours 24 Na Lungs 5.3 days 133 Xe Heart, bones, liver, lungs 6.0 hours 99 Tc Bones 2.8 hours 87 Sr Red blood cells 27.8 days 51 Cr Eyes, liver, tumors 14.3 days 32 P Metabolism 67 hours
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Lecture_Notes_103009b - Dating by Radioactivity Carbon...

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