Publications by authors named "B Beischer"
We report the observation of new properties of primary iron (Fe) cosmic rays in the rigidity range 2.65 GV to 3.0 TV with 0.
View Article and Find Full Text PDFWe report the observation of new properties of primary cosmic rays, neon (Ne), magnesium (Mg), and silicon (Si), measured in the rigidity range 2.15 GV to 3.0 TV with 1.
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- - The Alpha Magnetic Spectrometer (AMS) conducted precision measurements of helium isotopes (^3He and ^4He) on the International Space Station, collecting data from 100 million ^4He and 18 million ^3He nuclei over six years from 2011 to 2017.
- - The study found that the fluxes of both helium isotopes varied similarly over time, but the amount of variation decreased as the rigidity (energy per unit charge) increased.
- - For the first time, researchers measured the rigidity dependence of the ^3He/^4He flux ratio, showing notable long-term changes below 4 GV but stable characteristics and a specific power law relationship above that threshold, aligning with other spectral indices in
Precision results on cosmic-ray electrons are presented in the energy range from 0.5 GeV to 1.4 TeV based on 28.
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- Precision measurements of cosmic ray positrons up to 1 TeV were gathered by the Alpha Magnetic Spectrometer aboard the International Space Station, analyzing 1.9 million positrons.
- A significant excess of positrons begins at around 25.2 GeV, followed by a sharp decrease above approximately 284 GeV, indicating a complex energy dependency.
- The data suggests that at high energies, positrons mainly come from either dark matter annihilation or other astrophysical sources, with a notable energy cutoff of the source term established at about 810 GeV.