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Improved measurement of electron antineutrino disappearance at Daya Bay 被引量:38
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作者 安丰鹏 安琪 +228 位作者 白景芝 A.B.Balantekin H.R.Band W.Beriguete M.Bishai S.Blyth R.L.Brown 曹国富 曹俊 R.Carr W.T.Chan 常劲帆 Y.Chang C.Chasman 陈和生 H.Y.Chen 陈申见 陈少敏 陈潇聪 陈晓辉 陈晓苏 陈羽 陈义学 J.J.Cherwinka 朱明中 J.P.Cummings 邓子艳 丁雅韵 M.V.Diwan E.Draeger 杜小峰 D.Dwyer W.R.Edwards S.R.Ely 方绍东 付金煜 付在伟 葛良全 R.L.Gi11 M.Gonchar 龚光华 宫辉 Y.A.Gornushkin 顾文强 关梦云 郭新恒 R.W.Hackenburg R.L.Hahn S.Hans 郝慧峰 何苗 贺青 K.M.Heeger 衡月昆 P.Hinrichs Y.K.Hor Y.B.Hsiung B.z.Hu 胡涛 黄翰雄 H.z.Huang 黄性涛 P.Huber V.Issakov z.Isvan D.E.Jaffe S.Jetter 季筱璐 季向盼 姜海静 焦健斌 R.A.Johnson 康丽 S.H.Kettell M.Kramer 关健强 郭文伟 郭人能 C.Y.Lai 赖万昌 W.H.Lai K.Lau L.Lebanowski J.Lee 雷瑞霆 R.Leitner 梁干庄 梁嘉怡 C.A.Lewis 李飞 李高嵩 李秋菊 李卫东 李小波 李小男 李学潜 李仪 李志斌 梁昊 林政儒 C.L.Lin S.K.Lin 林延畅 凌家杰 J.M.Link L.Littenberg B.R.Littlejohn D.W.Liu 刘金昌 刘江来 刘颖彪 陆昌国 路浩奇 陆永康 K.B.Luk 马秋梅 马续波 马骁妍 马宇蒨 K.T.McDonald M.C.McFarlane R.D.McKeown y.meng D.Mohapatra Y.Nakajima J.Napolitano D.Naumov I.Nemchenok 倪浩然 W.K.Ngai 聂阳波 宁哲 J.P.Ochoa-Ricoux A.Olshevski S.Patton V.Pec J.C.Peng L.E.Piilonen L.Pinsky 潘振声 齐法制 祁鸣 钱鑫 N.Raper 任杰 R.Rosero B.Roskovec 阮锡超 邵贝贝 师恺 H.Steiner 孙功星 孙吉良 N.Tagg 谭耀豪 H.K.Tanaka 唐晓 H.Themann Y.Torun S.Trentalange O.Tsai K.V.Tsang R.H.M.Tsang C.E.Tull Y.C.Tung B.Viren V.Vorobe1 C.H.Wang 王灵淑 王玲玉 王龙泽 王萌 王乃彦 王瑞光 W.Wang 王玺 王贻芳 王喆 王铮 王志民 D.M.Webber 魏瀚宇 魏亚东 温良剑 K.Whisnant C.G.White L.Whitehead Y.Williamson T.Wise H.L.H.Wong E.T.Worcester F.F.Wu 吴群 习建博 夏冬梅 邢志忠 徐建一 徐晶 徐吉磊 徐晔 薛涛 杨长根 杨雷 叶梅 M.Yeh Y.S.Yeh B.L.Young 于泽源 占亮 C.Zhang 章飞虹 张家文 张清民 张书华 张一纯 张银鸿 张一心 张志坚 张子平 张智勇 赵洁 赵庆旺 赵豫斌 郑磊 钟玮丽 周莉 周祖英 庄红林 邹佳恒 《Chinese Physics C》 SCIE CAS CSCD 2013年第1期1-20,共20页
We report an improved measurement of the neutrino mixing angle θ13 from the Daya Bay Reactor Neutrino Experiment. We exclude a zero value for sin22θ13 with a significance of 7.7 standard deviations. Electron antineu... We report an improved measurement of the neutrino mixing angle θ13 from the Daya Bay Reactor Neutrino Experiment. We exclude a zero value for sin22θ13 with a significance of 7.7 standard deviations. Electron antineutrinos from six reactors of 2.9 GWm th were detected in six antineutrino detectors deployed in two near (flux-weighted baselines of 470 m and 576 m) and one far (1648 m) underground experimental halls. Using 139 days of data, 28909 (205308) electron antineutrino candidates were detected at the far hall (near halls). The ratio of the observed to the expected number of antineutrinos assuming no oscillations at the far hall is 0.944± 0.007(stat.) ± 0.003(syst.). An analysis of the relative rates in six detectors finds sin22θ13=0.089± 0.010(stat.)±0.005(syst.) in a three-neutrino framework. 展开更多
关键词 neutrino oscillation neutrino mixing REACTOR Daya Bay
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Effect of multilayer CrN/CrAlN coating on the corrosion and contact resistance behavior of 316L SS bipolar plate for high temperature proton exchange membrane fuel cell 被引量:5
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作者 S.Pugal Mani P.Agilan +3 位作者 M.Kalaiarasan K.Ravichandran N.Rajendran y.meng 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2022年第2期134-146,共13页
Stainless steels have received wide attention as a substitute material for bipolar plates in high temperature proton exchange membrane fuel cell(HT-PEMFC).In the present work,the CrN,CrAlN and multilayer CrN/CrAlN coa... Stainless steels have received wide attention as a substitute material for bipolar plates in high temperature proton exchange membrane fuel cell(HT-PEMFC).In the present work,the CrN,CrAlN and multilayer CrN/CrAlN coatings were deposited on 316 L SS to increase the corrosion resistance and decrease the interfacial contact resistance.The deposited coatings exhibited face centered cubic phase structure and it was verified from the X-ray diffraction pattern.X-ray photo electron spectroscopy results showed the formation of both CrN and CrAlN layers on 316 L SS.CrN/CrAlN coating is more helpful in water management due to low surface roughness and high contact angle in the HT-PEMFC environment.The corrosion resistance behavior of all the samples were studied in 85%H_(3)PO_(4)solution at 140℃purged with H_(2)(HT-PEMFC anode)and O_(2)(HT-PEMFC cathode)gases.The results showed that all the coatings considerably improved the performance of 316 L SS and superior corrosion resistance was observed for CrN/CrAlN multilayer coating,whose protective efficiency was 98.12%and 96.14%in the two simulated HT-PEMFC environments.The results of electrochemical impedance spectroscopic studies demonstrated higher impedance for CrN/CrAlN coating.Surface morphological studies performed after corrosion studies revealed that protection ability of CrN/CrAlN coating still remained acceptable.A very low interfacial contact resistance value of 6 mΩ cm^(2) at 140 N/cm;was observed for CrN/CrAlN coating.Moreover,after corrosion studies,the interfacial contact resistance value of CrN/CrAlN coated 316 L was much lower than that of CrN and CrAlN coatings due to the increased oxidation resistance.The maximum power density of about 0.93 W/cm^(2) at 2 A/cm^(2) and output voltage of 0.96 V was observed for CrN/CrAlN coating. 展开更多
关键词 Bipolar plate 316L SS CORROSION Contact resistance Contact angle Surface roughness
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Search for electron-antineutrinos associated with gravitational-wave events GW150914,GW151012,GW151226,GW170104,GW170608,GW170814,and GW170817 at Daya Bay 被引量:1
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作者 F.P.An A.B.Balantekin +183 位作者 H.R.Band M.Bishai S.Blyth G.F.Cao J.Cao J.F.Chang Y.Chang H.S.Chen S.M.Chen Y.Chen Y.X.Chen J.Cheng Z.K.Cheng J.J.Cherwinka M.C.Chu J.P.Cummings O.Dalager F.S.Deng Y.Y.Ding M.V.Diwan T.Dohnal J.Dove M.Dvorak D.A.Dwyer J.P.Gallo M.Gonchar G.H.Gong H.Gong W.Q.Gu J.Y.Guo L.Guo X.H.Guo Y.H.Guo Z.Guo R.W.Hackenburg S.Hans M.He K.M.Heeger Y.K.Heng A.Higuera Y.K.Hor Y.B.Hsiung B.Z.Hu J.R.Hu T.Hu Z.J.Hu H.X.Huang X.T.Huang Y.B.Huang P.Huber D.E.Jaffe K.L.Jen X.L.Ji X.P.Ji R.A.Johnson D.Jones L.Kang S.H.Kettell S.Kohn M.Kramer T.J.Langford J.Lee J.H.C.Lee R.T.Lei R.Leitner J.K.C.Leung F.Li J.J.Li Q.J.Li S.Li S.C.Li W.D.Li X.N.Li X.Q.Li Y.F.Li Z.B.Li H.Liang C.J.Lin G.L.Lin S.Lin J.J.Ling J.M.Link L.Littenberg B.R.Littlejohn J.C.Liu J.L.Liu C.Lu H.Q.Lu J.S.Lu K.B.Luk X.B.Ma X.Y.Ma Y.Q.Ma C.Marshall D.A.Martinez Caicedo K.T.MeDonald R.D.McKeown y.meng J.Napolitano D.Naumov E.Naumova J.P.Ochoa-Ricoux A.OIshevskiy H.-R.Pan J.Park S.Patton J.C.Peng C.S.J.Pun F.Z.Qi M.Qi X.Qian N.Raper J.Ren C.Morales Reveco R.Rosero B.Roskovec X.C.Ruan H.Steiner J.L.Sun T.Tmej K.Treskov W.-H.Tse C.E.Tull B.Viren V.Vorobel C.H.Wang J.Wang M.Wang N.Y.Wang R.G.Wang W.Wang W.Wang X.Wang Y.Wang Y.F.Wang Z.Wang Z.Wang Z.M.Wang H.Y.Wei L.H.Wei L.J.Wen K.Whisnant C.G.White H.L.H.Wong E.Worcester D.R.Wu F.L.Wu Q.Wu W.J.Wu D.M.Xia Z.Q.Xie Z.Z.Xing J.L.Xu T.Xu T.Xue C.G.Yang L.Yang Y.Z.Yang H.F.Yao M.Ye M.Yeh B.L.Young H.Z.Yu Z.Y.Yu B.B.Yue S.Zeng Y.Zeng L.Zhan C.Zhang F.Y.Zhang H.H.Zhang J.W.Zhang Q.M.Zhang X.T.Zhang Y.M.Zhang Y.X.Zhang Y.Y.Zhang Z.J.Zhang Z.P.Zhang Z.Y.Zhang J.Zhao L.Zhou H.L.Zhuang J.H.Zou 《Chinese Physics C》 SCIE CAS CSCD 2021年第5期190-201,共12页
The establishment of a possible connection between neutrino emission and gravitational-wave(GW)bursts is important to our understanding of the physical processes that occur when black holes or neutron stars merge.In t... The establishment of a possible connection between neutrino emission and gravitational-wave(GW)bursts is important to our understanding of the physical processes that occur when black holes or neutron stars merge.In the Daya Bay experiment,using the data collected from December 2011 to August 2017,a search was per-formed for electron-antineutrino signals that coincided with detected GW events,including GW150914,GW151012,GW151226,GW170104,GW170608,GW 170814,and GW 170817.We used three time windows of±10,±500,and±1000 s relative to the occurrence of the GW events and a neutrino energy range of 1.8 to 100 MeV to search for correlated neutrino candidates.The detected electron-antineutrino candidates were consistent with the expected background rates for all the three time windows.Assuming monochromatic spectra,we found upper limits(90%confidence level)of the electron-antineutrino fluence of(1.13-2.44)×10^(11)cm^(-2)at 5 MeV to 8.0×10^(7)cm^(-2)at 100 MeV for the three time w indows.Under the assumption of a Fermi-Dirac spectrum,the upper limits were found to be(5.4-7.0)×10^(9)cm^(2)for the three time windows. 展开更多
关键词 grav itational waves electron-antineutrinos FLUENCE upper limit
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Antineutrino energy spectrum unfolding based on the Daya Bay measurement and its applications
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作者 安丰鹏 A.B.Balantekin +190 位作者 M.Bishai S.Blyth 曹国富 曹俊 常劲帆 张昀 陈和生 陈少敏 陈羽 陈义学 程捷 成兆侃 J.J.Cherwinka 朱明中 J.P.Cummings O.Dalager 邓凡水 丁雅韵 M.V.Diwan T.Dohnal D.Dolzhikov J.Dove M.Dvorak D.A.Dwyer J.P.Gallo M.Gonchar 龚光华 宫辉 M.Grassi 顾文强 郭竞渊 郭磊 郭新恒 郭宇航 郭子溢 R.W.Hackenburg S.Hans 何苗 K.M.Heeger 衡月昆 贺远强 熊怡 胡貝楨 胡健润 胡涛 胡焯钧 黄翰雄 黄金浩 黄性涛 黄永波 P.Huber D.E.Jaffe 任國綸 季筱璐 季向盼 R.A.Johnson D.Jones 康丽 S.H.Kettell S.Kohn M.Kramer T.J.Langford J.Lee 李曉菁 雷瑞霆 R.Leitner 梁干庄 李飞 李慧玲 李进京 李秋菊 李茹慧 黎山峰 S.C.Li 李卫东 李小男 李学潜 李玉峰 李志兵 梁昊 林政儒 林贵林 林盛鑫 凌家杰 L.Littenberg B.R.Littlejohn 刘金昌 刘江来 刘佳熙 陆昌国 路浩奇 陆锦标 马帮争 马续波 马骁妍 马宇倩 R.C.Mandujano C.Marshall K.T.McDonald R.D.McKeown 孟月 J.Napolitano D.Naumov E.Naumova T.M.T.Nguyen J.P.Ochoa-Ricoux A.Olshevskiy 潘孝儒 J.Park S.Patton 彭仁杰 潘振声 齐法制 祁鸣 钱鑫 任杰 C.Morales Reveco R.Rosero B.Roskovec 阮锡超 H.Steiner 孙吉良 T.Tmej K.Treskov 謝雲皓 C.E.Tull B.Viren V.Vorobel 王正祥 王俊 王萌 王乃彦 王瑞光 王为 王维 王玺 王玉漫 王贻芳 王铮 王喆 王志民 魏瀚宇 韦良红 温良剑 K.Whisnant C.GWhite 黄显诺 E.Worcester 吴帝儒 武方亮 吴群 吴文杰 夏冬梅 谢章权 邢志忠 许杭锟 徐吉磊 徐彤 薛涛 杨长根 杨雷 杨玉梓 姚海峰 叶梅 叶铭芳 杨炳麟 余泓钊 于泽源 岳保彪 V.Zavadskyi 曾珊 曾裕达 占亮 张超 张飞洋 张宏浩 张家文 张清民 张石其 张玄同 张玉美 张一心 张园园 张志坚 张子平 张智勇 赵洁 赵润泽 周莉 庄红林 邹佳恒 《Chinese Physics C》 SCIE CAS CSCD 2021年第7期1-19,共19页
The prediction of reactor antineutrino spectra will play a crucial role as reactor experiments enter the precision era.The positron energy spectrum of 3.5 million antineutrino inverse beta decay reactions observed by ... The prediction of reactor antineutrino spectra will play a crucial role as reactor experiments enter the precision era.The positron energy spectrum of 3.5 million antineutrino inverse beta decay reactions observed by the Daya Bay experiment,in combination with the fission rates of fissile isotopes in the reactor,is used to extract the positron energy spectra resulting from the fission of specific isotopes.This information can be used to produce a precise,data-based prediction of the antineutrino energy spectrum in other reactor antineutrino experiments with different fission fractions than Daya Bay.The positron energy spectra are unfolded to obtain the antineutrino energy spectra by removing the contribution from detector response with the Wiener-SVD unfolding method.Consistent results are obtained with other unfolding methods.A technique to construct a data-based prediction of the reactor antineutrino energy spectrum is proposed and investigated.Given the reactor fission fractions,the technique can predict the energy spectrum to a 2%precision.In addition,we illustrate how to perform a rigorous comparison between the unfolded antineutrino spectrum and a theoretical model prediction that avoids the input model bias of the unfolding method. 展开更多
关键词 reactor antineutrino energy spectrum Daya Bay application
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