Glow-in-the-dark signs take advantage of β− particles emitted in the decay of certain isotopes that glow when interacting with matter. If such a sign has an activity of 15.3 Ci when it's manufactured and contain isotopes with a half-life of 12.5 y, what will its activity in Ci be 6.7 y later?
Nuclear Fusion
Nuclear fusion is a type of nuclear reaction. In nuclear fusion, two or more than two lighter atomic nuclei combine to form a heavier nucleus. During this process, an enormous amount of energy is released. This energy is called nuclear energy. Nuclear fusion is the energy source of the sun and stars.
Fusion Bomb
A fusion bomb is also known as a thermonuclear bomb or hydrogen bomb which releases a large amount of explosive energy during a nuclear chain reaction when the lighter nuclei in it, combine to form heavier nuclei, and a large amount of radiation is released. It is an uncontrolled, self-sustaining nuclear chain reaction where isotopes of hydrogen combine under very high temperature to form helium. They work on the principle of operation of atomic fusion. The isotopes of Hydrogen are deuterium and tritium, where they combine their masses and have greater mass than the product nuclei, get heated at high temperatures, and releases energy.
Glow-in-the-dark signs take advantage of β− particles emitted in the decay of certain isotopes that glow when interacting with matter. If such a sign has an activity of 15.3 Ci when it's manufactured and contain isotopes with a half-life of 12.5 y, what will its activity in Ci be 6.7 y later?
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