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Sensing and Datalogging for Science Education |
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Sciencescope |
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Last updated 31st July 2008 Sensors Logbooks PriceLists Investigations 2008 Catalogue |
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Radioactivity- AThe
time taken for the activity of a radioactive source to reduce by half is called
the half-life of the source. You are going to measure the half-life of protactinium 234. This is a beta-emitting decay product in the decay of uranium-238; part of the series is given above:
The protactinium-234 is extracted almost completely by an organic solvent, such as amyl acetate, from an acidified aqueous solution of uranyl nitrate (which contains proportionally, 1g uranyl nitrate, to 3 cm3 water, to 7 cm3 concentrated hydrochloric acid). Only the high-energy beta particles from the decay of protactinium-234 are detected by a G-M tube.
This show how the Radioactive count rate sensor was set up to study half-life. View and/or download the worksheet View and/or download the Datadisc file examples of this investigation. (you must have Datadisc installed to view the file, downloadable from Download Centre) |
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