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Observation of the antimatter helium-4 nucleus
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SYSNO ASEP 0365520 Document Type J - Journal Article R&D Document Type Journal Article Subsidiary J Článek ve WOS Title Observation of the antimatter helium-4 nucleus Author(s) Agakishiev, C. (RU)
Aggarwal, M. M. (IN)
Ahammed, Z. (US)
Bielčík, J. (CZ)
Bielčíková, Jana (UJF-V) RID, ORCID, SAI
Chaloupka, Petr (UJF-V) RID
Chung, P. (CZ)
Kapitán, Jan (UJF-V)
Kouchpil, V. (CZ)
Rusnak, J. (CZ)
Šumbera, Michal (UJF-V) RID, ORCID, SAI
Tlustý, David (UJF-V)Number of authors 400 Source Title Nature. - : Palgrave Macmillan - ISSN 0028-0836
Roč. 473, č. 7347 (2011), s. 353-356Number of pages 4 s. Language eng - English Country GB - United Kingdom Keywords QUARK-GLUON PLASMA ; ANTIPROTONS ; COLLISIONS ; ELECTRON Subject RIV BG - Nuclear, Atomic and Molecular Physics, Colliders R&D Projects LA09035 GA MŠMT - Ministry of Education, Youth and Sports (MEYS) CEZ AV0Z10480505 - UJF-V (2005-2011) UT WOS 000290722400043 DOI 10.1038/nature10079 Annotation High-energy nuclear collisions create an energy density similar to that of the Universe microseconds after the Big Bang(1); in both cases, matter and antimatter are formed with comparable abundance. However, the relatively short-lived expansion in nuclear collisions allows antimatter to decouple quickly from matter, and avoid annihilation. Thus, a high-energy accelerator of heavy nuclei provides an efficient means of producing and studying antimatter. The antimatter helium-4 nucleus ((4)(He) over bar), also known as the anti-alpha ((alpha) over bar), consists of two antiprotons and two antineutrons (baryon number B = -4). It has not been observed previously, although the alpha-particle was identified a century ago by Rutherford and is present in cosmic radiation at the ten per cent level(2). Workplace Nuclear Physics Institute Contact Markéta Sommerová, sommerova@ujf.cas.cz, Tel.: 266 173 228 Year of Publishing 2012
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