Neutrino weighed soil

Neutrinos are neutral particles of small mass.

Physicists used ultra-light particle neutrino movement data to determine large-scale parameters of the entire planet Earth, including mass. In addition, scientists were able to obtain information on the change in density from the surface to the nucleus. The results presented in the journal Nature Physics, reports the Chronicle.info.

They are born in many reactions, for example in the center of the stars, nuclear reactors on Earth and in the interaction of cosmic rays with the atmosphere of the planet. Neutrinos interact very weakly with ordinary matter and therefore risk flying earth.

However, some particles are still absorbed, as evidenced by their high flow rates. This allows you to explore the bowels of the planet because the probability of absorption depends on the energy of the particles and the distance traveled.

In the new work, physicists were able to collect enough statistics to determine the parameters of the Earth solely on the basis of neutrino absorption. The work focused on the largest IceCube neutrino detector located at the South Pole of Antarctica, which captures the past through the depths of the Earth's particles.

The neutrinos that appeared at the North Pole, to be recorded, had to cross the whole planet, including its nucleus, and fly at great angles only through the bark. This allowed us to calculate the distribution of the mass in the whole volume.

The new method has become an independent addition to existing methods used to determine the properties of the planet as a function of the gravitational field and the propagation of seismic waves, the speed of which depends on the density of the medium. The results of all methods are consistent and confirm the accuracy of modern ideas and the structure of the Earth.

At the present time, neutrinos are not allowed to obtain new information on the planet, but in the future, they are not excluded. For example, some dark matter models suggest the accumulation of substances in the centers of all large bodies, and differences in the definition of the properties of a nucleus in a gravitational field and the absorption of neutrinos may indicate the presence of matter. black in the nucleus. of the earth.

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