In 1938 one of the world's utmost scientists withdrew all his money and vanished during a boat journey from Palermo to Naples. Whether he slayed himself, was killed or lived on under a diverse identity is still not identified. But no hint of the Italian physicist EttoreMajorana has eternally been found. Majorana was a bright theoretician who in the 1930's presented great vision into physics at a young age. He revealed a previously unknown solution to the equations from which quantum researchers comprehend elementary particles: the Majorana fermion. Majorana inferred from quantum theory the option that there must be a distinctive particle that would be accurate on the border between matter and antimatter. Neutrinos are minute, neutral elementary particles that, opposing to the standard model of physics, have been confirmed to have mass. One likely description for this mass might be that neutrinos are their own antiparticles, known as Majorana particles, termed after our lost physicist. However experimental indication for this is still missing, numerous theoretical additions of the standard model of physics expect the Majorana nature of neutrinos. If this theory verifies to be true, many earlier unanswered questions about the source of our universe and the beginning of matter might be answered.
In the EXO-200(Enriched Xenon Observatory), experimentation which is functioned in the U.S. state of New Mexico, 650 meters under the earth's surface, researchers are looking for the indication. Physicists from the study group of Professor Peter Fierlinger of the Excellence Cluster Universe at the Technische Universitaet Muenchen are main sponsors to this experimentation.
The utmost subtle technique to experimentally prove the Majorana query is the search for a process called "neutrinoless double-beta decay". This procedure is an exceptional radioactive decay that might only happen if neutrinos are their own antiparticles. The EXO-200 experimentation has examined for these decays over numerous years. From the point that not one of these decays has been spotted, the scientists can now infer a lower limit for the half-life of the decay of at least 1025 years, about one million-billion years more than the oldness of the universe. Dr. Michael Marino, associate of the study group of Professor Peter Fierlinger and accountable for the study of the now issued data, said "Although this measurement attains unprecedented accuracy, the question about the nature of neutrinos can still not be answered. That's why this open issue remains one of the most exciting questions in physics. This result demonstrates the high sensitivity of the detector and also the future potential of this method. Hence the EXO-200 measurements are also the basis for a much larger future experiment that finally could confirm or refute the Majorana nature of neutrinos."
The EXO-200(Enriched Xenon Observatory) research customs liquid xenon that was enriched to 80.6 percent of xenon-136 in Russian separators. Xenon-136 is an isotope that is permitted by theory to experience neutrinoless double-beta decay. The experiment's position in the Waste Isolation Pilot Plant (WIPP) 650 meters underground offers shielding against radioactive decays and cosmic radiation.
EXO-200(Enriched Xenon Observatory) is teamwork of study groups from Russia, Canada, Switzerland and the USA; the Technische Universitaet Muenchen is the only German companion.
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