Primary proton spectrum around the knee observed by the Tibet air-shower experiment
文献类型：期刊论文
| 作者 | Tibet ASGamma Collaboration |
| 刊名 | ASTROPHYSICS
 |
| 出版日期 | 2006 |
| 卷号 | 37期号:10页码:1938-1943 |
| 关键词 | ELECTROMAGNETIC CASCADE SHOWERS COSMIC-RAY COMPOSITION ENERGY-RANGE HYBRID-EXPERIMENT REGION HELIUM NUCLEI LEAD |
| 通讯作者 | Huang, J (reprint author), Univ Tokyo, Inst Cosm Ray Res, Kashiwa, Chiba 2778582, Japan. |
| 英文摘要 | Simultaneous observation of gamma-families and their accompanying air showers was performed at Yangbajing (4300 m above sea level) in Tibet with the emulsion chambers and burst detectors which were linked with the Tibet-II air-shower array. For three years operation, we observed 177 gamma-families (Sigma E-gamma > 20 TeV) accompanying air showers with the size N-e > 2 x 10(5). Using this data and the simulation code CORSIKA, we obtained the primary proton spectrum in the energy range of 10(15)-10(16) eV. The slope of the observed spectrum is steeper than that extrapolated smoothly from the lower energy region below 10(14) eV, irrespective of the interaction models assumed in the simulation. The uncertainty of the absolute flux of protons due to the interaction model dependence involved in the simulation codes is at most 30%, which is much weaker than results of other air-shower experiments. Our experiment shows low intensity of light components (proton and helium) independent of the interaction models suggesting that the main component responsible for making the knee structure of the all-particle spectrum is composed of nuclei heavier than helium. This is the first measurement of the differential energy spectra of primary protons by selecting them event by event at the knee energy region. (c) 2005 COSPAR. Published by Elsevier Ltd. All rights reserved. |
| 学科主题 | Engineering; Astronomy & Astrophysics; Geology; Meteorology & Atmospheric Sciences |
| 类目[WOS] | Engineering, Aerospace ; Astronomy & Astrophysics ; Geosciences, Multidisciplinary ; Meteorology & Atmospheric Sciences |
| 收录类别 | SCI |
| 语种 | 英语 |
| WOS记录号 | WOS:000239306500019 |
| 公开日期 | 2016-02-25 |
| 源URL | [http://ir.ihep.ac.cn/handle/311005/212692]  |
| 专题 | 高能物理研究所_粒子天体物理中心 |
| 作者单位 | 中国科学院高能物理研究所 |
| 推荐引用方式 GB/T 7714 | Tibet ASGamma Collaboration. Primary proton spectrum around the knee observed by the Tibet air-shower experiment[J]. ASTROPHYSICS,2006,37(10):1938-1943. |
| APA | Tibet ASGamma Collaboration.(2006).Primary proton spectrum around the knee observed by the Tibet air-shower experiment.ASTROPHYSICS,37(10),1938-1943. |
| MLA | Tibet ASGamma Collaboration."Primary proton spectrum around the knee observed by the Tibet air-shower experiment".ASTROPHYSICS 37.10(2006):1938-1943. |
入库方式： OAI收割
来源：高能物理研究所
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