Cosmic-ray energy spectrum around the knee obtained by the Tibet experiment and future prospects

doi:10.1016/j.asr.2010.08.029

	Cosmic-ray energy spectrum around the knee obtained by the Tibet experiment and future prospects
	Amenomori, M.2; Bi, X. J.3; Chen, D.4; Cui, S. W.5; Danzengluobu 6; Ding, L. K.3; Ding, X. H.6; Fan, C.7; Feng, C. F.7; Feng, Zhaoyang 3
刊名	ADVANCES IN SPACE RESEARCH
	2011-02-15
卷号	47 页码:629-639
关键词	Cosmic-rays Knee region Proton and helium spectra
ISSN号	0273-1177
DOI	10.1016/j.asr.2010.08.029
英文摘要	The observation of the extensive air showers has been carried out since 1990 by Tibet air-shower array to study the origin of the cosmic-rays. In order to investigate the chemical composition around the knee, air-shower core detector was used in two experimental phases aiming to separate light primary elements (proton and helium). In a first phase experiment made in 1996-1999, primary proton and helium spectra were measured using a hybrid detector consisted of Tibet II air-shower array, emulsion chambers, and burst detectors. The result indicated that the fraction of light elements among the all particle spectrum is less than 30%. We performed the second phase experiment in 2002-2005 to measure proton + helium together to confirm the previous result with higher statistics by improving the detection efficiency for the air-shower cores. The P + He spectrum was obtained in a good agreement with previous result by several times higher statistics. The flux of the light elements, together with the all-particle energy spectrum, indicates the dominance of nuclei heavier than helium in the energy range around the knee. We also present the outline of the next phase experiment, which is to measure the heavy elements around the knee, using low threshold air-shower core detector named YAC. (C) 2010 COSPAR. Published by Elsevier Ltd. All rights reserved.
资助项目	Ministry of Science and Technology of China ; Ministry of Foreign Affairs of Japan ; Ministry of Education, Culture, Sports, Science, and Technology ; Japan Society for the Promotion of Science in Japan ; National Natural Science Foundation of China ; Chinese Academy of Sciences
WOS关键词	AIR-SHOWER ARRAY ; PRIMARY PROTON SPECTRUM ; SHOCK ACCELERATION ; GAMMA-RAYS ; TEV ; RANGE
WOS研究方向	Astronomy & Astrophysics ; Geology ; Meteorology & Atmospheric Sciences
语种	英语
出版者	ELSEVIER SCI LTD
WOS记录号	WOS:000287433100008
资助机构	Ministry of Science and Technology of China ; Ministry of Foreign Affairs of Japan ; Ministry of Education, Culture, Sports, Science, and Technology ; Japan Society for the Promotion of Science in Japan ; National Natural Science Foundation of China ; Chinese Academy of Sciences
内容类型	期刊论文
源URL	[http://119.78.100.186/handle/113462/34895]
专题	中国科学院近代物理研究所
通讯作者	Katayose, Y.
作者单位	1.Yokohama Natl Univ, Fac Engn, Yokohama, Kanagawa 2408501, Japan 2.Hirosaki Univ, Dept Phys, Hirosaki, Aomori 0368561, Japan 3.Chinese Acad Sci, Inst High Energy Phys, Key Lab Particle Astrophys, Beijing 100049, Peoples R China 4.Univ Tokyo, Inst Cosm Ray Res, Kashiwa, Chiba 2778582, Japan 5.Hebei Normal Univ, Dept Phys, Shijiazhuang 050016, Peoples R China 6.Tibet Univ, Dept Math & Phys, Lhasa 850000, Peoples R China 7.Shandong Univ, Dept Phys, Jinan 250100, Peoples R China 8.SW Jiaotong Univ, Inst Modern Phys, Chengdu 610031, Peoples R China 9.Yunnan Univ, Dept Phys, Kunming 650091, Peoples R China 10.Kanagawa Univ, Fac Engn, Yokohama, Kanagawa 2218686, Japan
推荐引用方式 GB/T 7714	Amenomori, M.,Bi, X. J.,Chen, D.,et al. Cosmic-ray energy spectrum around the knee obtained by the Tibet experiment and future prospects[J]. ADVANCES IN SPACE RESEARCH,2011,47:629-639.
APA	Amenomori, M..,Bi, X. J..,Chen, D..,Cui, S. W..,Danzengluobu.,...&Zhou, X. X..(2011).Cosmic-ray energy spectrum around the knee obtained by the Tibet experiment and future prospects.ADVANCES IN SPACE RESEARCH,47,629-639.
MLA	Amenomori, M.,et al."Cosmic-ray energy spectrum around the knee obtained by the Tibet experiment and future prospects".ADVANCES IN SPACE RESEARCH 47(2011):629-639.