"First result from the Alpha Magnetic Spectrometer on the International Space Station: precision measurement of the positron fraction in primary cosmic rays of 0.5–350 GeV"
https://scholar.google.com/scholar?hl=de&as_sdt=0%2C5&q=alph...
"First result from the Alpha Magnetic Spectrometer on the International Space Station: precision measurement of the positron fraction in primary cosmic rays of 0.5–350 GeV"
https://scholar.google.com/scholar?hl=de&as_sdt=0%2C5&q=alph...