Measurement of cosmic ray H and He isotopes in a Balloon Borne Experiment with a Superconducting Solenoid Spectrometer |
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| Institution: | 1. Institute for Physical Science and Technology, University of Maryland, College Park, MD 20742, U.S.A.;2. University of Tokyo, Bunkyo-ku, Tokyo 113, Japan;3. National Laboratory for High Energy Physics (KEK), Tsukuba, Ibaraki, Japan;4. Kobe University, Kobe, Hyogo, Japan;5. NASA Goddard Space Flight Center, Greenbelt, MD 20771, U.S.A.;6. Institute for Space and Astronautical Science (ISAS), Sagamihara, Kanagawa 229, Japan;1. School of Physics, Weijin Road 94, Tianjin, China;2. Institute of Physics, Academia Sinica Nankang, Taipei 11529, Taiwan;3. School of Science, 77 Massachusetts Ave, Cambridge, MA 02139, USA;1. Kobe University, Kobe, Hyogo 657-8501, Japan;2. Institute of Space and Astronautical Science, Japan Aerospace Exploration Agency (ISAS/JAXA), Sagamihara, Kanagawa 252-5210, Japan;3. High Energy Accelerator Research Organization (KEK), Tsukuba, Ibaraki 305-0801, Japan;4. NASA-Goddard Space Flight Center (NASA-GSFC), Greenbelt, MD 20771, USA;5. IPST, University of Maryland, College Park, MD 20742, USA;6. The University of Tokyo, Bunkyo, Tokyo 113-0033, Japan;7. University of Denver, Denver, CO 80208, USA;8. Okayama University, Okayama, Okayama 700-0082, Japan |
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| Abstract: | The Balloon Borne Experiment with a Superconducting Solenoid Spectrometer (BESS) was flown annually in 1993, 1994, and 1995. In this report we present the energy spectra and isotopic composition of cosmic ray H and He measured from the 1993 flight. The low energy fluxes of H and He agree with the IMP-8 satellite data for a 26 day period (7/14/93 – 8/9/93) that overlapped the BESS flight. Both 2H and 3He were well separated from 1H and 4He. The measured spectra were corrected for the atmospheric overburden and compared with the interstellar/heliospheric propagation calculations. |
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