2000/02/25 by T. Sanuki, M. Motoki, H. Matsumoto +38 · 316 citations
Physics and Astronomy · #Astronomy #Atomic physics #Cosmic ray #Dark Matter and Cosmic Phenomena #Helium #Magnetic field #Neutrino Physics Research #Nuclear physics #Nucleon #Optics #Particle physics theoretical and experimental studies #Physics #Proton #Rigidity (electromagnetism) #Solenoidal vector field #Spectral line #Spectrometer #astro-ph
paper · pdf · doi:10.1086/317873
published in The Astrophysical Journal 545(2), 1135-1142 (IOP Publishing) · 12 pages, 4 figures
arxiv created 2000/02/25 · openalex publication_date 2000/12/20 · arxiv updated 2009/12/01 · openalex created_date 2025/10/10 · openalex updated_date 2026/08/06
We report cosmic-ray proton and helium spectra in energy ranges of 1-120 GeV nucleon -1 and 1-54 GeV nucleon -1 , respectively, measured by a flight of the Balloon-borne Experiment with Superconducting Spectrometer (BESS) in 1998. The magnetic rigidity of the cosmic ray was reliably determined by highly precise measurement of the circular track in a uniform solenoidal magnetic field of 1 T. Those spectra were determined within overall uncertainties of ±5% for protons and ±10% for helium nuclei including statistical and systematic errors.