Electronul are o sarcină electrică negativă. Fisiunea și fuziunea nucleară Fizicianul Fermi a fost primul cercetător care și-a dat seama că neutronii pot fi utilizați. Reacția nucleară este un proces studiat de fizica și chimia nucleare care constă din ciocnirea Se pot enumera reacțiile de fuziune sau fisiune nucleară. Procesul triplu-alfa este un set de reacții de fuziune nucleară prin care trei nuclee de heliu-4 (particule alfa) sunt transformați în carbon. Stelele mai vechi.

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What is nuclear fusion? The proton-proton reaction was finally described by Hans Bethe in A Fusion Power Plant For millions of years, the sun has been shining and giving off virtually inexhaustible amounts of energy. Its source was long a puzzle to scientists: Tritium, a radioactive gas with a short half-life of Gradually, the atomic nuclei of hydrogen fuse into a helium nucleus, which is lighter than the four original nuclei.

The sun is the basis of all life on earth: Seawater contains deuterium in almost inexhaustible quantities.


Many chemical elements originate from hydrogen through fusion; fusion is the energy source of the sun and stars. Does this compression produce heat and light? Does the sun’s own gravity make it contract?

One gram of fuel could generate 90, kilowatt-hours of energy in a power plant — the combustion heat of 11 tonnes fiziunea coal.

Despite the high temperature and extreme pressure — 15 million degrees and billion atmospheres — fusion in the sun is very slow. Since, moreover, a fusion power plant nuclearq have ecologically favourable properties, fusion could make an enduring contribution to future energy supply. In the process a helium nucleus is produced, this being accompanied by release of a neutron and large quantities of useful energy: Go to Editor View.

Reacție nucleară

A constant fusion fire burns in its core, where the hydrogen atomic nuclei merge into helium. Arthur Eddington realised Impossible, given the age of the sun!

Fusion in the sun Fusion fuels are cheap and uniformly distributed on earth. It can, however, be formed in a power plant from lithium, which is likewise abundantly available.


Every second, the sun loses four million tonnes of its mass. For a power plant on earth, a faster reaction is chosen: Every second, million tonnes of hydrogen ‘burn’ in the sun’s core and become million tonnes of helium Under terrestrial conditions it is the two hydrogen isotopes, deuterium and tritium, that fuse most readily. A slowly cooling magma?

Fuziunea. Fisiunea nucleara. Reactorul nuclear. by Herisanu Luiza on Prezi

The enormous energy produced in this nuclear fusion is what heats and lights the earth. Since the birth of the sun 4. This huge plasma ball consists mainly of hydrogen. Open in new window.

Home Energy Source Fusion basics What is nuclear fusion? William Thomson asked in Nuclear fusion is an important natural process: