Deuterium-Deuterium fusion, often abbreviated as D-D fusion, is a nuclear fusion reaction that occurs when two deuterium (D) nuclei, or isotopes of hydrogen, combine. This process is of significant interest in the field of nuclear fusion due to its potential as a future energy source.
The D-D fusion reaction can result in two possible outcomes. In the first, a deuterium nucleus fuses with another deuterium nucleus to produce a helium-3 nucleus and a neutron. In the second possible reaction, the two deuterium nuclei combine to form a tritium nucleus and a proton. Both reactions release a significant amount of energy, but the first reaction is slightly more probable.
The reactions can be represented as follows:
The numbers in parentheses represent the energy released by each reaction in millions of electron volts (MeV).
The energy produced in D-D fusion comes from the conversion of mass into energy, as described by Einstein's famous equation, E=mc^2. The small loss in mass during the fusion reaction results in a large release of energy due to the large value of the speed of light squared (c^2) in the equation.
The D-D fusion reaction releases less energy than the D-T (Deuterium-Tritium) fusion reaction, but it has other advantages that make it an attractive option for fusion power.
One of the main advantages of D-D fusion is that deuterium is readily available in seawater, making it a virtually limitless fuel source. Additionally, D-D fusion does not produce high-energy neutrons, which can cause materials to become radioactive.
However, D-D fusion also has its challenges. The main disadvantage is that it requires higher temperatures to overcome the electrostatic repulsion between the two positively charged deuterium nuclei. This makes achieving the conditions for D-D fusion more difficult than for D-T fusion.
In conclusion, while D-D fusion presents some challenges, its potential benefits make it a promising area of research in the quest for a sustainable and clean energy source.