Cosmogenic Backgrounds in Borexino at 3800 m water-equivalent depth
Cosmogenic Backgrounds in Borexino at 3800 m water-equivalent depth
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DOI：
10.1088/1475-7516/2013/08/049
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发表时间：
2013-04
期刊：
影响因子：
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通讯作者：
G. Bellini;J. Benziger;D. Bick;G. Bonfini;D. Bravo;M. Avanzini;B. Caccianiga;L. Cadonati;F. Calaprice;P. Cavalcante;A. Chavarria;A. Chepurnov;D. D’Angelo;S. Davini;A. Derbin;A. Empl;A. Etenko;K. Fomenko;D. Franco;C. Galbiati;S. Gazzana;C. Ghiano;M. Giammarchi;M. Göger-Neff;A. Goretti;L. Grandi;C. Hagner;E. Hungerford;A. Ianni;A. Ianni;V. Kobychev;D. Korablev;G. Korga;D. Kryn;M. Laubenstein;T. Lewke;E. Litvinovich;B. Loer;P. Lombardi;F. Lombardi;L. Ludhova;G. Lukyanchenko;I. Machulin;S. Manecki;W. Maneschg;G. Manuzio;Q. Meindl;E. Meroni;L. Miramonti;M. Misiaszek;R. Möllenberg;P. Mosteiro;V. Muratova;L. Oberauer;M. Obolensky;F. Ortica;K. Otis;M. Pallavicini;L. Papp;L. Perasso;S. Perasso;A. Pocar;G. Ranucci;A. Razeto;A. Re;A. Romani;N. Rossi;R. Saldanha;C. Salvo;S. Schönert;H. Simgen;M. Skorokhvatov;O. Smirnov;A. Sotnikov;S. Sukhotin;Y. Suvorov;Y. Suvorov;R. Tartaglia;G. Testera;D. Vignaud;R. Vogelaar;F. Feilitzsch;J. Winter;M. Wójcik;A. Wright;M. Wurm;J. Xu;O. Zaimidoroga;S. Zavatarelli;G. Zuzel
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文献类型：
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作者：
G. Bellini;J. Benziger;D. Bick;G. Bonfini;D. Bravo;M. Avanzini;B. Caccianiga;L. Cadonati;F. Calaprice;P. Cavalcante;A. Chavarria;A. Chepurnov;D. D’Angelo;S. Davini;A. Derbin;A. Empl;A. Etenko;K. Fomenko;D. Franco;C. Galbiati;S. Gazzana;C. Ghiano;M. Giammarchi;M. Göger-Neff;A. Goretti;L. Grandi;C. Hagner;E. Hungerford;A. Ianni;A. Ianni;V. Kobychev;D. Korablev;G. Korga;D. Kryn;M. Laubenstein;T. Lewke;E. Litvinovich;B. Loer;P. Lombardi;F. Lombardi;L. Ludhova;G. Lukyanchenko;I. Machulin;S. Manecki;W. Maneschg;G. Manuzio;Q. Meindl;E. Meroni;L. Miramonti;M. Misiaszek;R. Möllenberg;P. Mosteiro;V. Muratova;L. Oberauer;M. Obolensky;F. Ortica;K. Otis;M. Pallavicini;L. Papp;L. Perasso;S. Perasso;A. Pocar;G. Ranucci;A. Razeto;A. Re;A. Romani;N. Rossi;R. Saldanha;C. Salvo;S. Schönert;H. Simgen;M. Skorokhvatov;O. Smirnov;A. Sotnikov;S. Sukhotin;Y. Suvorov;Y. Suvorov;R. Tartaglia;G. Testera;D. Vignaud;R. Vogelaar;F. Feilitzsch;J. Winter;M. Wójcik;A. Wright;M. Wurm;J. Xu;O. Zaimidoroga;S. Zavatarelli;G. Zuzel
太阳中微子实验Borexino位于Gran Sasso地下实验室，在研究有机液体闪烁体中的μ子诱导背景方面具有独特的优势。在这项研究中，大样本的宇宙μ子识别和跟踪的μ子否决探测器外部的液体闪烁体，并通过特定的光模式时观察到μ子穿过闪烁体体积。测得μ子感生中子产额为Yn =（3.10 ± 0.11）× 10 ~（-4）n/（μ g/cm ~ 2）。母μ子径迹和中子俘获点之间的距离分布具有平均值{\lambda} =（81.5 +- 2.7）cm。此外，还测量了12 N、12 B、8He、9 C、9 Li、8B、6 He、8Li、11Be、10 C和11 C等宇宙成因放射性同位素的产额。所有的结果进行了比较与Monte Carlo模拟预测使用Fluka和Geant 4包。一般协议之间的数据和模拟观察宇宙成因的生产产量有几个例外，最突出的情况是11 C产量，这两个代码返回约50%的低值。预测的{\mu}-n距离分布和中子多重数分布被认为是与数据的总体一致。
The solar neutrino experiment Borexino, which is located in the Gran Sasso underground laboratories, is in a unique position to study muon-induced backgrounds in an organic liquid scintillator. In this study, a large sample of cosmic muons is identified and tracked by a muon veto detector external to the liquid scintillator, and by the specific light patterns observed when muons cross the scintillator volume. The yield of muon-induced neutrons is found to be Yn =(3.10+-0.11)10-4 n/({\mu} (g/cm2)). The distance profile between the parent muon track and the neutron capture point has the average value {\lambda} = (81.5 +- 2.7)cm. Additionally the yields of a number of cosmogenic radioisotopes are measured for 12N, 12B, 8He, 9C, 9Li, 8B, 6He, 8Li, 11Be, 10C and 11C. All results are compared with Monte Carlo simulation predictions using the Fluka and Geant4 packages. General agreement between data and simulation is observed for the cosmogenic production yields with a few exceptions, the most prominent case being 11C yield for which both codes return about 50% lower values. The predicted {\mu}-n distance profile and the neutron multiplicity distribution are found to be overall consistent with data.