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College Physics (Urone)
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Short Answer

What lifetime do you expect for an antineutron isolated from normal matter?

The lifetime of an antineutron isolated from normal matter is small and stable without any change.

See the step by step solution

Step by Step Solution

Step 1: Antineutron

The antineutron is the antiparticle of the neutron. It only varies from the neutron in that certain of its characteristics have the same magnitude as the neutron but have the opposite sign.

Step 2: Lifetime of Antineutron

The usual short life of an antineutrino is due to its reactive nature with normal matter, as particles and antiparticles tend to annihilate. If an antineutrino were isolated from normal matter, it would behave equivalently to a usual neutrino, so we would expect it to be stable, as there are no lower energy states for it to decay to.

Therefore, the lifetime of antineutron is very short.

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