Irradiated Salt - It Is Not Radioactive!!


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Irradiated Salt (~100 g)
RAD-160

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Ordinary table salt, NaCl, when exposed to very high ionizing radiation, turns brown. When this salt is heated on a hot-plate (ca 190^oC), a flash of visible light can be observed and the salt returns to its white color (only safe visible light is given off). This principle is used in many dosimeters that measure radiation exposure. When placed in our reactor, gamma radiation from a cobalt 60 source promotes electrons in the table salt crystals to higher energy levels. In this excited state, electrons in the salt can absorb certain wavelengths of visible light, resulting in the observed brown color. Heat enables the excited electrons to fall back to the ground state with the emission of a flash of visible light and the return of its white color. This is a wonderful, and completely safe, nuclear chemistry demonstration with many connections to social issues such as the irradiation of food products to preserve them. Included: 100 g irradiated NaCl and instructions.

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Set of 2 Antique Bottles (one irradiated, one not)

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