Measurement of the cosmic ray proton spectrum from 40 GeV to 100 TeV with the DAMPE satellite

doi:10.1126/sciadv.aax3793

	Measurement of the cosmic ray proton spectrum from 40 GeV to 100 TeV with the DAMPE satellite
	An, Q.1,2; Asfandiyarov, R.3; Azzarello, P.3; Bernardini, P.4,5; Bi, X. J.6,7; Cai, M. S.8,9; Chang, J.8,9 ; Chen, D. Y.7,8; Chen, H. F.1,2; Chen, J. L.10
刊名	SCIENCE ADVANCES
	2019-09-01
卷号	5 期号:9 页码:10
ISSN号	2375-2548
DOI	10.1126/sciadv.aax3793
通讯作者	An, Q.()
英文摘要	The precise measurement of the spectrum of protons, the most abundant component of the cosmic radiation, is necessary to understand the source and acceleration of cosmic rays in the Milky Way. This work reports the measurement of the cosmic ray proton fluxes with kinetic energies from 40 GeV to 100 TeV, with 21/2 years of data recorded by the DArk Matter Particle Explorer (DAMPE). This is the first time that an experiment directly measures the cosmic ray protons up to similar to 100 TeV with high statistics. The measured spectrum confirms the spectral hardening at similar to 300 GeV found by previous experiments and reveals a softening at similar to 13.6 TeV, with the spectral index changing from similar to 2.60 to similar to 2.85. Our result suggests the existence of a new spectral feature of cosmic rays at energies lower than the so-called knee and sheds new light on the origin of Galactic cosmic rays.
WOS关键词	ENERGY ; PAMELA ; CALIBRATION ; NUCLEI
WOS研究方向	Science & Technology - Other Topics
语种	英语
出版者	AMER ASSOC ADVANCEMENT SCIENCE
WOS记录号	WOS:000491128800094
内容类型	期刊论文
源URL	[http://libir.pmo.ac.cn/handle/332002/28269]
专题	中国科学院紫金山天文台
通讯作者	An, Q.
作者单位	1.Univ Sci & Technol China, State Key Lab Particle Detect & Elect, Hefei 230026, Anhui, Peoples R China 2.Univ Sci & Technol China, Dept Modern Phys, Hefei 230026, Anhui, Peoples R China 3.Univ Geneva, Dept Nucl & Particle Phys, CH-1211 Geneva, Switzerland 4.Univ Salento, Dipartimento Matemat & Fis E De Giorgi, I-73100 Lecce, Italy 5.INFN, Sez Lecce, I-73100 Lecce, Italy 6.Chinese Acad Sci, Inst High Energy Phys, Yuquan Rd 19B, Beijing 100049, Peoples R China 7.Univ Chinese Acad Sci, Yuquan Rd 19A, Beijing 100049, Peoples R China 8.Chinese Acad Sci, Purple Mt Observ, Key Lab Dark Matter & Space Astron, Nanjing 210033, Jiangsu, Peoples R China 9.Univ Sci & Technol China, Sch Astron & Space Sci, Hefei 230026, Anhui, Peoples R China 10.Chinese Acad Sci, Inst Modern Phys, Nanchang Rd 509, Lanzhou 730000, Gansu, Peoples R China
推荐引用方式 GB/T 7714	An, Q.,Asfandiyarov, R.,Azzarello, P.,et al. Measurement of the cosmic ray proton spectrum from 40 GeV to 100 TeV with the DAMPE satellite[J]. SCIENCE ADVANCES,2019,5(9):10.
APA	An, Q..,Asfandiyarov, R..,Azzarello, P..,Bernardini, P..,Bi, X. J..,...&Zimmer, S..(2019).Measurement of the cosmic ray proton spectrum from 40 GeV to 100 TeV with the DAMPE satellite.SCIENCE ADVANCES,5(9),10.
MLA	An, Q.,et al."Measurement of the cosmic ray proton spectrum from 40 GeV to 100 TeV with the DAMPE satellite".SCIENCE ADVANCES 5.9(2019):10.