scholarly journals A New Low Background Laboratory in the Pyhäsalmi Mine: Towards 14C free liquid scintillator for low energy neutrino experiments

2017 ◽  
Author(s):  
Sultim Lubsandorzhiev ◽  
Kari Enqvist ◽  
J Hissa ◽  
J Joutsenvaara ◽  
J Kutuniva ◽  
...  
Keyword(s):  
Liquid Scintillator ◽  
Low Energy ◽  
Low Background ◽  
Energy Neutrino ◽  
Neutrino Experiments

Limits on low-energy neutrino fluxes with the Mont Blanc liquid scintillator detector

1992 ◽  
Vol 1 (1) ◽  
pp. 1-9 ◽  
Author(s):  
M. Aglietta ◽  
P. Antonioli ◽  
G. Badino ◽  
G. Bologna ◽  
C. Castagnoli ◽  
...  
Keyword(s):  
Liquid Scintillator ◽  
Low Energy ◽  
Energy Neutrino ◽  
Neutrino Fluxes ◽  
Scintillator Detector

scholarly journals Identification of the cosmogenic $$^{11}$$C background in large volumes of liquid scintillators with Borexino

2021 ◽  
Vol 81 (12) ◽  
Author(s):  
M. Agostini ◽  
K. Altenmüller ◽  
S. Appel ◽  
V. Atroshchenko ◽  
Z. Bagdasarian ◽  
...  
Keyword(s):  
Solar Neutrino ◽  
Time Correlation ◽  
Space Time ◽  
Low Energy ◽  
High Multiplicity ◽  
Data Sets ◽  
Novel Technique ◽  
Energy Neutrino ◽  
Time Correlations ◽  
Neutrino Experiments

AbstractCosmogenic radio-nuclei are an important source of background for low-energy neutrino experiments. In Borexino, cosmogenic $$^{11}$$ 11 C decays outnumber solar pep and CNO neutrino events by about ten to one. In order to extract the flux of these two neutrino species, a highly efficient identification of this background is mandatory. We present here the details of the most consolidated strategy, used throughout Borexino solar neutrino measurements. It hinges upon finding the space-time correlations between $$^{11}$$ 11 C decays, the preceding parent muons and the accompanying neutrons. This article describes the working principles and evaluates the performance of this Three-Fold Coincidence (TFC) technique in its two current implementations: a hard-cut and a likelihood-based approach. Both show stable performances throughout Borexino Phases II (2012–2016) and III (2016–2020) data sets, with a $$^{11}$$ 11 C tagging efficiency of $$\sim 90$$ ∼ 90  % and $$\sim $$ ∼  63–66 % of the exposure surviving the tagging. We present also a novel technique that targets specifically $$^{11}$$ 11 C produced in high-multiplicity during major spallation events. Such $$^{11}$$ 11 C appear as a burst of events, whose space-time correlation can be exploited. Burst identification can be combined with the TFC to obtain about the same tagging efficiency of $$\sim 90\%$$ ∼ 90 % but with a higher fraction of the exposure surviving, in the range of $$\sim $$ ∼  66–68 %.

scholarly journals Low Energy Neutrino Astronomy in the future large-volume liquid-scintillator detector LENA

2008 ◽  
Vol 136 (4) ◽  
pp. 042071
Author(s):  
Michael Wurm ◽  
F V Feilitzsch ◽  
M Göger-Neff ◽  
T Lewke ◽  
T Marrodan Undagoitia ◽  
...  
Keyword(s):  
Large Volume ◽  
Liquid Scintillator ◽  
Low Energy ◽  
Energy Neutrino ◽  
The Future ◽  
Neutrino Astronomy ◽  
Scintillator Detector
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