Astrophysicists have found, using spacecraft Pamela, that in Earth's magnetosphere is manifested a flow of antiprotons resulting from nuclear interactions of cosmic rays (energetic charged particles such as protons, electrons and helium nuclei) and the Earth's atmosphere, antiprotons that accumulates in geomagnetic field at altitudes of several hundred kilometers.
When cosmic rays emanating from the sun and other sources in the universe, atoms bombard the Earth's upper atmosphere, the result is similar as collisions in particle accelerators manifested on the ground, that new particles are born.
For a while experts suspect that these collisions produce atmospheric antiprotons, just as in accelerators, but so far has only been speculated about their fate, once the scenarios are created.
Theoretically, these particles should be concentrated in the Earth's magnetic field, possibly in the region called the South Atlantic Magnetic Anomaly, that part of the Van Allen Belt is closest to the Earth and where energy charged particles tend to gather.
To solve the mystery, astronomers released in 2006 on orbit, PAMELA spacecraft , just with a mission to identify antiprotons in cosmic rays. Now that they have carefully analyzed the data collected by the probe in 850 days orbiting the Earth, it was found that Pamela found, indeed, 28 antiprotons in the South Atlantic Magnetic Anomaly. The amount has exceeded any expectations of anyone trying to find some type of solar wind particles and achievement show that antiprotons are captured and stored in even one of Van Allen axes.
The discovery of a further belt of antiprotons has a major impact because the number is small compared to electrons and protons trapped in the same area. But confirmation of theoretical predictions is always interesting.
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