Antiproton

Antiproton (p )

The antiproton is the antimatter particles ( antiparticles ) to a normal proton. It has the same mass as the proton, but has a negative charge. Normal matter, we are made of and around us is made up of particles like protons, neutrons and electrons. However, there is a direct antimatter partner who was predicted in 1928 by Paul Dirac and demonstrated experimentally ( positron, 1932) For every block in our matter. Antiprotons are part of the cosmic radiation. On Earth, they do not occur naturally and can only be produced artificially in accelerators; the antineutrino and the positron arise, however, in nature, in beta decays.

The antiproton was first in 1955, artificially generated at the Lawrence Berkeley National Laboratory with a proton beam of 6.3 GeV, who met on a copper target. The available energy in the center- just enough to Nukleonenpaarerzeugung ( proton and antiproton ), so that the antiproton moves slowly. The magnetic deflection of particles of negative charge allowed a " sorting out " of antiprotons. From the momentum and velocity analysis in two scintillation counters, the evidence showed that negatively charged particles were formed with the proton mass: The suppression of Mesonenuntergrundes carried out by appropriate coincidence circuits.

Emilio Segrè received in 1959 along with Owen Chamberlain for the Nobel Prize in Physics " for their discovery of the antiproton " whose existence they could prove with the help of Clyde E. Wiegand and Thomas Ypsilanti ( 1928-2000 ). Contrary to expectations, it is not annihilated with a proton immediately into electromagnetic radiation, but it creates multiple free pions.

For the investigation of antiprotons at CERN is the memory ring Antiproton Decelerator. In construction located at the GSI facility for antiproton research, called Facility for Antiproton and Ion Research (FAIR).

An application of the antiprotons could be the anti Proto Stereographie niches that will enable it to carry out radiation much more efficiently. However, the production of antiproton beams is connected to a much larger effort than the production of proton beams. Currently, few accelerators are most capable of doing.

The antiproton is the core of the simplest anti- atom: antihydrogen.

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