Nuclear fusion, process by which nuclear reactions between light elements form heavier elements. Thermonuclear reaction in which the nuclei of an element of low atomic weight unite under extremely high temperature and pressure to … Nuclear fusion is an atomic reaction in which multiple atom s combine to create a single, more massive atom. Nuclear Fusion reactions power the Sun and other stars. The Sun is Earth’s major source of energy, yet the planet only receives a small portion of its energy and the Sun is just an ordinary star. In cases where interacting nuclei belong to elements with low atomic numbers, substantial amounts of energy are released. The resulting atom has a slightly smaller mass than the sum of the masses of the original atoms. This process occurs in our Sun and other stars. The process releases energy because the total mass of the resulting single nucleus is less than the mass of the two original nuclei. The vast energy potential of nuclear fusion was first exploited in thermonuclear weapons. Fusion “ignition” refers to the moment when the energy from a controlled fusion reaction outstrips the rate at which x-ray radiation losses and electron conduction cool the implosion: as much or more energy “out” than “in.” Achieving ignition would be an unprecedented, game-changing breakthrough for science and could lead to a new source of boundless clean energy for the world. Creating conditions for fusion on Earth involves generating and sustaining a plasma. By Daniel Clery Nov. 23, 2020 , 10:45 AM. Laser fusion reactor approaches ‘burning plasma’ milestone. Light and the Sun. Earth Science. Star Power. Nuclear Fusion - Science topic. Many stars produce much more energy than the Sun. Search for: Nuclear Fusion. Fusion energy science is a multi-disciplinary field focused on the science needed to develop an energy source based on a controlled thermonuclear fusion reaction.Fusion occurs when two nuclei combine to form a new nucleus. In a fusion reaction, two light nuclei merge to form a single heavier nucleus. The energy source for all stars is nuclear fusion.
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