Improved measurement of the reactor antineutrino flux and spectrum at Daya Bay

doi:10.1088/1674-1137/41/1/013002

	Improved measurement of the reactor antineutrino flux and spectrum at Daya Bay
	Daya Bay Collaboration
刊名	CHINESE PHYSICS C中国物理. C
	2017
卷号	41 期号:1 页码:13002
关键词	antineutrino flux energy spectrum reactor Daya Bay
ISSN号	1674-1137
DOI	10.1088/1674-1137/41/1/013002
文献子类	Article
英文摘要	A new measurement of the reactor antineutrino flux and energy spectrum by the Daya Bay reactor neutrino experiment is reported. The antineutrinos were generated by six 2.9 GW(th) nuclear reactors and detected by eight antineutrino detectors deployed in two near (560 m and 600 m flux-weighted baselines) and one far (1640 m flux-weighted baseline) underground experimental halls. With 621 days of data, more than 1.2 million inverse beta decay (IBD) candidates were detected. The IBD yield in the eight detectors was measured, and the ratio of measured to predicted flux was found to be 0.946 +/- 0.020 (0.992 +/- 0.021) for the Huber+Mueller (ILL+Vogel) model. A 2.9 sigma deviation was found in the measured IBD positron energy spectrum compared to the predictions. In particular, an excess of events in the region of 4-6 MeV was found in the measured spectrum, with a local significance of 4.4 sigma. A reactor antineutrino spectrum weighted by the IBD cross section is extracted for model-independent predictions.
WOS关键词	NEUTRON FISSION-PRODUCTS ; LONG-BASE-LINE ; OSCILLATIONS ; CALIBRATION ; DETECTORS ; THETA(13) ; SEARCH ; SYSTEM ; PU-239
WOS研究方向	Physics
语种	英语
CSCD记录号	CSCD:5899528
WOS记录号	WOS:000393254200002
内容类型	期刊论文
源URL	[http://ir.ihep.ac.cn/handle/311005/284298]
专题	高能物理研究所_实验物理中心
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	Daya Bay Collaboration. Improved measurement of the reactor antineutrino flux and spectrum at Daya Bay[J]. CHINESE PHYSICS C中国物理. C,2017,41(1):13002.
APA	Daya Bay Collaboration.(2017).Improved measurement of the reactor antineutrino flux and spectrum at Daya Bay.CHINESE PHYSICS C中国物理. C,41(1),13002.
MLA	Daya Bay Collaboration."Improved measurement of the reactor antineutrino flux and spectrum at Daya Bay".CHINESE PHYSICS C中国物理. C 41.1(2017):13002.