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Beta Radiation Spectrometer

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  • Assembly_instructions_for_radiation_deflector_kit.pdf
  • VernierBetaRadiationDeflectionCollimatorMustBeSolid.stl
  • VernierBetaRadiationDeflectorWithoutCollimator.stl

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Publication date 2023-02-07 at 07:06
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Published to Thingiverse on: 2017-07-06 at 22:11
Design number 1051015

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3D model description

All students learn about radioactivity, and most have heard that the consequences include everything from Godzilla to spider senses. But few of them know we can safely measure the energy of radiation and do something called nuclear spectroscopy in an ordinary science lab.

Print yourself a simple beta radiation spectrometer from a Vernier Radiation Monitor, a couple of strong magnets, and a Vernier Rotary Motion Sensor. Note: A protractor can be used in place of the Rotary Motion Sensor for manual data collection.

In our setup, a radioactive source emits beta particles into a strong magnetic field. Magnets bend the path of the charged beta particles. The least energetic particles bend the most, emerging with a larger deflection angle, and the most energetic ones bend the least. So one can calculate the energy of a beta particle from the deflection angle. By slowly rotating a radiation source while measuring the radiation at the other side of the magnets, one can find the number of counts per minute at any given angle. A little physics converts the measured angle to a corresponding energy. The result is a spectrum of beta radiation that can be compared with published spectra.

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