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Properties of Cosmic Helium Isotopes Measured by the Alpha Magnetic Spectrometer
Precision measurements by the Alpha Magnetic Spectrometer (AMS) on the International Space Station of $^{3}He$ and $^{4}He$ fluxes are presented. The measurements are based on 100 million $^{4}He$ nuclei in the rigidity range from 2.1 to 21 GV and 18 million He3 from 1.9 to 15 GV collected from May...
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