Experimental principleIn supersaturated vapors, the gas phase state of the material is unstable.Once there is condensation nuclei, the gas molecules in the supersaturated steam will rapidly condense around the condensation nuclei, and the gas phase will change into a liquid phase, producing many small droplets that can be viewed by the naked eye.High-energy particles are themselves a type of condensation nuclei. High-energy particles pass through the air to ionize the air, producing a series of condensation nuclei along their tracks.Therefore, by viewing the distribution of small droplets, it is possible to "see" the track of high energy particles.The supersaturated steam in this experiment is supersaturated by letting the steam produced by the aqueous solution of C2H5OH undergo an adiabatic expansion process, and the high-energy particle a particles are derived from the decay of the helium source.Precautions1. After the first experiment, at least 5 minutes or more is being done for the second experiment.2, anhydrous ethanol is flammable, pay special attention to safety when using.3, Wuyuan is a radioactive source, immediately put back the lead box protection box after use, do not lose.4. When the source is removed and the source is removed, it must be done with the power supply completely disconnected.
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