Nuclear fusion is a reaction in which two or more atomic nuclei (for example, nuclei of hydrogen isotopes deuterium and tritium), combine to form one or more atomic nuclei and neutrons. The difference in mass between the reactants and products is manifested as either the release or absorption of energy .

2025年1月15日 · Fusion occurs when two light atoms like hydrogen combine to form a heavier atom like helium. This process occurs in our Sun and other stars. To create and sustain fusion on Earth, scientists use devices that generate and sustain plasmas.

2025年1月23日 · Hydrogen (H) “burning” initiates the fusion energy source of stars and leads to the formation of helium (He). Generation of fusion energy for practical use also relies on fusion reactions between the lightest elements that burn to form helium.

2024年5月7日 · Scientists at New Jersey's Princeton Plasma Physics Laboratory, who collaborated on the project, announced today that the device created a super-hot material called a plasma that reached 90 million degrees Fahrenheit (50 …

2022年8月12日 · Nuclear fusion is the process that powers the Sun and other stars: heavy hydrogen atoms collide with enough force that they fuse together to form a helium atom, releasing large amounts of...

Fusion power is a proposed form of power generation that would generate electricity by using heat from nuclear fusion reactions. In a fusion process, two lighter atomic nuclei combine to form a heavier nucleus, while releasing energy. Devices designed to harness this energy are known as fusion reactors.

2023年6月1日 · The fusion of two hydrogen atoms to make helium is the main process that powers the sun and other stars. When such light atomic nuclei combine, they release an immense amount of energy.

First, two protons (hydrogen atoms stripped of their electrons) react to produce a deuteron, a positron and a neutrino. Then the deuteron, 2 H, captures a proton to form the helium isotope 3 He (helium-3), and then two 3 He nuclei fuse to form 4 He with the emission of two protons.

The prime energy producer in the Sun is the fusion of hydrogen to form helium, which occurs at a solar-core temperature of 14 million kelvin. The net result is the fusion of four protons into one alpha particle, with the release of two positrons, two neutrinos (which changes two of the protons into neutrons), and energy (Figure \(\PageIndex{2}\)).

2025年1月30日 · The clean energy source we’ve been pursuing for decades is advancing with 200,000 “plasma shots” at General Atomics in San Diego, and the creation of an international fusion facility in France.