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- Dictionaryradioactive/ˌreɪdɪəʊˈaktɪv/
adjective
- 1. emitting or relating to the emission of ionizing radiation or particles: "radioactive decay"
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4 days ago · Radioactive decay is a fundamental process in nuclear physics in which an unstable atom loses energy by emitting particles or radiation. This process helps the atom become more stable over time. It happens naturally and is important in many fields, such as medical imaging and finding the age of rocks and fossils.
2 days ago · When produced in standard alpha radioactive decay, alpha particles generally have a kinetic energy of about 5 MeV and a velocity in the vicinity of 4% of the speed of light. They are a highly ionizing form of particle radiation, with low penetration depth (stopped by a few centimetres of air, or by the skin ).
2 days ago · Thorium is a moderately soft, paramagnetic, bright silvery radioactive actinide metal that can be bent or shaped. In the periodic table, it lies to the right of actinium, to the left of protactinium, and below cerium. Pure thorium is very ductile and, as normal for metals, can be cold-rolled, swaged, and drawn. [10] .
5 days ago · Fukushima accident, disaster that occurred in 2011 at the Fukushima Daiichi (‘Number One’) nuclear power plant on the Pacific coast of northern Japan, which was caused by a severe earthquake and powerful series of tsunami waves and was the second worst nuclear power accident in history.
- The Editors of Encyclopaedia Britannica
- The Fukushima accident was an accident in 2011 at the Fukushima Daiichi (“Number One”) nuclear power plant in Japan. It is the second worst nuclear...
- An earthquake and tsunami led to power loss in the Fukushima Daiichi plant. Without power, the cooling systems failed in three reactors, and their...
- Immediately after the Fukushima accident in 2011, radiation levels increased in food, water, and the ocean near the Fukushima Daiichi plant. Becaus...
- Nobody died as a direct result of the Fukushima nuclear disaster. However, in 2018 one worker in charge of measuring radiation at the plant died of...
4 days ago · nuclear reactor, any of a class of devices that can initiate and control a self-sustaining series of nuclear fission s. Nuclear reactors are used as research tools, as systems for producing radioactive isotope s, and most prominently as energy sources for nuclear power plants.
2 days ago · A popular source of the latter type is radioactive antimony-124 plus beryllium, a system with a half-life of 60.9 days, which can be constructed from natural antimony (which is 42.8% stable antimony-123) by activating it with neutrons in a nuclear reactor, then transported to where the neutron source is needed.
5 days ago · 16.1 Radioactivity—The Disintegration of the Atomic Nucleus; 16.2 Alpha, Beta, and Gamma Rays; 16.3 Environmental Radiation; 16.4 Transmutation of Elements—Changing Identities; 16.5 Half-Life Is a Measure of Radioactive Decay Rate; 16.6 Isotopic Dating Measures the Ages of Materials; 16.7 Nuclear Fission’The breaking Apart of Atomoic Nuclei
