2003年4月
Precise measurements of atmospheric muon fluxes with the BESS spectrometer
ASTROPARTICLE PHYSICS
- 巻
- 19
- 号
- 1
- 開始ページ
- 113
- 終了ページ
- 126
- 記述言語
- 英語
- 掲載種別
- 研究論文(学術雑誌)
- DOI
- 10.1016/S0927-6505(02)00195-0
- 出版者・発行元
- ELSEVIER SCIENCE BV
The vertical absolute fluxes of atmospheric muons and muon charge ratio have been measured precisely at different geomagnetic locations by using the BESS spectrometer. The observations had been performed at sea level (30 m above sea level) in Tsukuba, Japan, and at 360 m above sea level in Lynn Lake, Canada. The vertical cutoff rigidities in Tsukuba (36.2degreesN, 140.1degreesE) and in Lynn Lake (56.5degreesN, 101.0degreesW) are 11.4 and 0.4 GV, respectively. We have obtained vertical fluxes of positive and negative muons in a momentum range from 0.6 to 20 GeV/c with systematic errors <3% in both measurements. By comparing the data collected at two different geomagnetic latitudes, we have seen an effect of cutoff rigidity. The dependence on the atmospheric pressure and temperature, and the solar modulation effect have been also clearly observed. We also clearly observed the decrease of charge ratio of muons at low momentum side with at higher cutoff rigidity region. (C) 2002 Elsevier Science B.V. All rights reserved.
- リンク情報
- ID情報
-
- DOI : 10.1016/S0927-6505(02)00195-0
- ISSN : 0927-6505
- Web of Science ID : WOS:000181705100008