@article{8fd8ad49a0c4485eba9c93312579db47,
title = "Successive measurements of cosmic-ray antiproton spectrum in a positive phase of the solar cycle",
abstract = "The energy spectrum of cosmic-ray antiprotons ({\=p}'s) has been measured by BESS successively in 1993, 1995, 1997 and 1998. In total, 848 {\=p}'s were clearly identified in energy range 0.18-4.20 GeV. From these successive measurements of the {\=p} spectrum at various solar activity, we discuss about the effect of the solar modulation and the origin of cosmic-ray {\=p}'s. The {\=p}/p ratios showed no distinctive year-to-year variation during the positive Sun's polarity phase.",
keywords = "95.85.Ry, 98.70.Sa, Antiproton, Cosmic-ray, Measurements, Solar modulation",
author = "T. Maeno and S. Orito and H. Matsunaga and K. Abe and K. Anraku and Y. Asaoka and M. Fujikawa and M. Imori and Y. Makida and N. Matsui and H. Matsumoto and J. Mitchell and T. Mitsui and A. Moiseev and M. Motoki and J. Nishimura and M. Nozaki and J. Ormes and T. Saeki and T. Sanuki and M. Sasaki and Seo, {E. S.} and Y. Shikaze and T. Sonoda and R. Streitmatter and J. Suzuki and K. Tanaka and I. Ueda and Wang, {J. Z.} and N. Yajima and T. Yamagami and A. Yamamoto and T. Yoshida and K. Yoshimura",
note = "Funding Information: http://odysseus.uchicago.edu/NeutronMonitor/ . University of Chicago, “National Science Foundation Grant ATM-9613963” Funding Information: Sincere thanks are given to NASA/GSFC/WFF balloon office and NSBF for balloon launch and recovery of the payload in Canada campaign. The authors deeply thank ISAS and KEK for their continuous support and encouragement for the BESS experiment. They would specially thank Prof. T. Sumiyoshi, Dr. R. Suda and Mr. T. Ooba for their kind guidance and cooperation to develop Aerogel Cherenkov Counters for the flight in 1998. The analysis was performed by using the computing facilities at ICEPP, University of Tokyo. This experiment was supported by Grant-in-Aid for Scientific Research in Monbusho, Heiwa Nakajima Foundation in Japan, and by NASA in the USA. ",
year = "2001",
month = nov,
doi = "10.1016/S0927-6505(01)00107-4",
language = "English",
volume = "16",
pages = "121--128",
journal = "Astroparticle Physics",
issn = "0927-6505",
publisher = "Elsevier",
number = "2",
}