21 research outputs found
Application of the Electron Microscope to the Cytochemical Peroxidase Reaction in Salamander Leukocytes
Precise Measurement of Cosmic-Ray Proton and Helium Spectra with the BESS Spectrometer
We report cosmic-ray proton and helium spectra in energy ranges of 1 to 120
GeV and 1 to 54 GeV/nucleon, respectively, measured by a balloon flight of the
BESS spectrometer in 1998. The magnetic-rigidity of the cosmic-rays was
reliably determined by highly precise measurement of the circular track in a
uniform solenoidal magnetic field of 1 Tesla. Those spectra were determined
within overall uncertainties of +-5 % for protons and +- 10 % for helium nuclei
including statistical and systematic errors.Comment: 12 pages, 4 figure
Measurements of Cosmic-ray Low-energy Antiproton and Proton Spectra in a Transient Period of the Solar Field Reversal
The energy spectra of cosmic-ray low-energy antiprotons and protons have been
measured by BESS in 1999 and 2000, during a period covering the solar magnetic
field reversal. Based on these measurements, a sudden increase of the
antiproton to proton flux ratio following the solar magnetic field reversal was
observed, and it generally agrees with a drift model of the solar modulation.Comment: 4 pages, 4 figures, revised version accepted for publication in Phys.
Rev. Let