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Дата последнего поиска статьи во внешних источниках: 24 октября 2016 г.
Аннотация:The Alpha Magnetic Spectrometer (AMS) was flown on the space shuttle Discovery during flight STS-91 in a 51.7 degrees orbit at altitudes between 320 and 390 km. A total of 2.86 X 10(6) helium nuclei were observed in the rigidity range 1 to 140 GV. No antihelium nuclei were detected at any rigidity. An upper limit on the flux ratio of antihelium to helium of < 1.1 X 10(-6) is obtained. (C) 1999 Published by Elsevier Science B.V. All rights reserved.