How is a neutron made?

Answer 1

As the name suggests, neutron stars are actually composed of neutrons. When there is a sufficiently strong gravitational field, atoms (or superheated plasma consisting of fragments of atoms) collapse, and the electrons and the protons combine to form neutrons. Only neutrons are left.

Answer 2

It depends what you mean by "made". Neutrons pervade nature in all elements except hydrogen and were possibly "made" in nature in the early moments after the big bang from quarks and gluons coalescing once the temperature dropped enough for this to happen. If you mean made as in laboratory situations and for nuclear reaction purposes, a neutron heavy substance such as Uranium readily sheds neutrons as the neutrons contribute to the instability of the heavy uranium atom. So they are not really made, but "found" in a sense.

Answer 3

Nucleons are made up from quarks. Protons and neutrons each contain three quarks. We haven't been able to split a proton or neutron apart so its more of an idea of quarks based on evidence

There are several types of quark we name them on characteristics they give to a particle. Such as up, down, top, bottom, spin, charm and strange.

Nucleons (otherwise known as baryons when outside the atom) contain only up and down quarks

Proton: UUD

Neutron: UDD

antimatter is made up of antiquarks and follow a similar pattern to how matter is made up

Answer 4

Along with protons, neutrons make up the nucleus, held together by the strong force. The neutron is a baryon and is considered to be composed of two down quarks and one up quark.

A free neutron will decay with a half-life of about 10.3 minutes but it is stable if combined into a nucleus. The decay of the neutron involves the weak interaction as indicated in the Feynman diagram to the right. This fact is important in models of the early universe. The neutron is about 0.2% more massive than a proton, which translates to an energy difference of 1.29 MeV.

The decay of the neutron is associated with a quark transformation in which a down quark is converted to an up by the weak interaction . The average lifetime of 10.3 min/0.693 = 14.9 minutes is surprisingly long for a particle decay that yields 1.29 MeV of energy. You could say that this decay is steeply "downhill" in energy and would be expected to proceed rapidly. It is possible for a proton to be transformed into a neutron, but you have to supply 1.29 MeV of energy to reach the threshold for that transformation. In the very early stages of the big bang when the thermal energy was much greater than 1.29 MeV, we surmise that the transformation between protons and neutrons was proceeding freely in both directions so that there was an essentially equal population of protons and neutrons.

Answer 5

The composition of a neutron is said to be one up quark and two down quarks.

Free neutrons decay, giving off particles, which are a proton, and electron, and an electron antineutrino.

Answer 6

Neutrons are made of Quarks. More specifically, 1 "up quark" and 2 "down quarks."

Answer 7

Protons and neutrons are made of quarks and gluons.

Answer 8

Neutrons are made of subatomic particles called quarks