A series of star cycles formed the heavier elements in the universe.
Formation of heavier elements:
- Elements heavier are produced mainly by neutron-capture inside stars, although there are other more minor contributors (cosmic ray spallation, radioactive decay).
- The heavier elements in the universe were formed by fusion reactions.
- Fusion reaction is a type of nuclear reaction where two or more nuclei collide to form an element with a higher atomic number.
- Fusion reaction is the source of power for the Sun and other stars in the universe.
- The most common example of this reaction that happens in space is the fusion of hydrogen isotopes forming a much heavy element which is helium.
- For this reaction to occur, the nuclei of the atoms should be very close to each other so that the nuclear forces would bind them together.
Thus, it can be concluded that Elements heavier are produced mainly by neutron-capture inside stars.
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