Scientists first used "mirror cores" to study neutron stars

Researchers from the University of Michigan, led by Alex Brown, first used charge

radii of a pair of "mirror cores" to studythe nature of neutron stars. Mirror nuclei are isobar nuclei with the same mass number A, which transform into each other when replacing neutrons with protons and protons with neutrons.

Scientists channeled electrons to lead nuclei andcalcium. Depending on how the electrons were scattered or deflected from the nuclei, scientists were able to calculate the upper and lower limits for the size of the neutron shell.

Researchers can make accurate measurementsmasses of neutron stars, but it is difficult to obtain exact figures for their diameters. Understanding the push and pull forces inside neutron stars has improved estimates of their size.

In atomic nuclei, neutrons protrude slightly,forming a thin layer, consisting only of neutrons, which goes beyond the protons. It is called the neutron shell. Measuring the neutron envelope allows researchers to learn about the interactions of nuclei and, as a result, about neutron stars.

A neutron star is born when it is very largethe star goes supernova and explodes, leaving behind a core. The gravity of this massive remnant causes it to collapse on itself. As the collapse proceeds, the star also begins to transform its matter, the substance of which it is composed, into neutrons. Hence the name - "neutron star".

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