Počet záznamů: 1
Observation of the antimatter helium-4 nucleus
0365520 - UJF-V 2012 RIV GB eng J - Článek v odborném periodiku
Agakishiev, C. - Aggarwal, M. M. - Ahammed, Z. - Bielčík, J. - Bielčíková, Jana - Chaloupka, Petr - Chung, P. - Kapitán, Jan - Kouchpil, V. - Rusnak, J. - Šumbera, Michal - Tlustý, David
Observation of the antimatter helium-4 nucleus.
Nature. Roč. 473, č. 7347 (2011), s. 353-356 ISSN 0028-0836
Grant CEP: GA MŠk LA09035
Výzkumný záměr: CEZ:AV0Z10480505
Klíčová slova: QUARK-GLUON PLASMA * ANTIPROTONS * COLLISIONS * ELECTRON
Kód oboru RIV: BG - Jaderná, atomová a mol. fyzika, urychlovače
Impakt faktor: 36.280, rok: 2011
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).
Trvalý link: http://hdl.handle.net/11104/0200748