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          Institute: MPI für Kernphysik     Collection: Neutrino Physics     Display Documents

ID: 284641.0, MPI für Kernphysik / Neutrino Physics
CNO and pep neutrino spectroscopy in Borexino: Measurement of the deep-underground production of cosmogenic C-11 in an organic liquid scintillator
Authors:Back, H. O.; Balata, M.; de Bari, A.; de Bellefon, A.; Bellini, G.; Benziger, J.; Bonetti, S.; Buck, C.; Caccianiga, B.; Cadonati, L.; Calaprice, F.; Cecchet, G.; Chen, M.; Di Credico, A.; Dadoun, O.; D'Angelo, D.; Derbin, A.; Deutsch, M.; Etenko, A.; von Feilitzsch, F.; Fernholz, R.; Ford, R.; Franco, D.; Freudiger, B.; Galbiati, C.; Gazzana, S.; Giammarchi, M. G.; Goeger-Neff, M.; Goretti, A.; Grieb, C.; Hampel, W.; Harding, E.; Hartmann, F. X.; Heusser, G.; Ianni, A.; Ianni, A. M.; de Kerret, H.; Kiko, J.; Kirsten, T.; Kobychev, V. V.; Korga, G.; Korschinek, G.; Kozlov, Y.; Kryn, D.; Laubenstein, M.; Lendvai, C.; Leung, M.; Litvinovich, E.; Lombardi, P.; Machulin, I.; Malvezzi, S.; Maneira, J.; Manno, I.; Manuzio, D.; Manuzio, G.; Masetti, F.; Martemianov, A.; Mazzucato, U.; McCarty, K.; Meroni, E.; Mention, G.; Miramonti, L.; Monzani, M. E.; Muratova, V.; Musico, P.; Niedermeier, L.; Oberauer, L.; Obolensky, M.; Ortica, F.; Pallavicini, M.; Papp, L.; Perasso, L.; Peiffer, P.; Pocar, A.; Raghavan, R. S.; Ranucci, G.; Razeto, A.; Sabelnikov, A.; Salvo, C.; Scardaoni, R.; Schimizzi, D.; Schönert, S.; Simgen, H.; Shutt, T.; Skorokhvatov, M.; Smirnov, O.; Sonnenschein, A.; Sotnikov, A.; Sukhotin, S.; Suvorov, Y.; Tarasenkov, V.; Tartaglia, R.; Testera, G.; Vignaud, D.; Vogelaar, R. B.; Vyrodov, V.; Wojcik, M.; Zaimidoroga, O.; Zuzel, G.
Date of Publication (YYYY-MM-DD):2006
Title of Journal:Physical Review C
Issue / Number:4
Sequence Number of Article:045805
Review Status:Peer-review
Audience:Experts Only
Abstract / Description:Borexino is an experiment for low energy neutrino spectroscopy at the Gran Sasso underground laboratories. It is designed to measure the mono-energetic $^7$Be solar neutrino flux in real time, via neutrino-electron elastic scattering in ultra-pure organic liquid scintillator. Borexino has the potential to also detect neutrinos from the \emph{pep} fusion process and the CNO cycle. For this measurement to be possible, radioactive contamination in the detector must be kept extremely low. Once sufficiently clean conditions are met, the main background source is $^{11}$C, produced in reactions induced by the residual cosmic muon flux on $^{12}$C. In the process, a free neutron is almost always produced. $^{11}$C can be tagged on an event by event basis by looking at the three-fold coincidence with the parent muon track and the subsequent neutron capture on protons. This coincidence method has been implemented on the Borexino Counting Test Facility data. We report on the first event by event identification of \emph{in situ} muon induced $^{11}$C in a large underground scintillator detector. We measure a $^{11}$C production rate of 0.130 $\pm$ 0.026 (stat) $\pm$ 0.014 (syst) day$^{-1}$ ton$^{-1}$, in agreement with predictions from both experimental studies performed with a muon beam on a scintillator target and \emph{ab initio} estimations based on the $^{11}$C producing nuclear reactions.
External Publication Status:published
Document Type:Article
Affiliations:MPI für Kernphysik/Group of M. Lindner
External Affiliations:Physics Department, Virginia Polytechnic Institute and State University, Robeson Hall, VA 24061-0435 Blacksburg, USA
I.N.F.N Laboratori Nazionali del Gran Sasso, SS 17 bis Km 18+910, 67010 Assergi(AQ), Italy
Dipartimento di Fisica Nucleare e Teorica Universita and I.N.F.N., Via A. Bassi 6, 27100 Pavia, Italy
Laboratoire de Physique Corpusculaire et Cosmologie, 11 place Marcelin, Berthelot, 75231 Paris Cedex 05, France
Dipartimento di Fisica Universitá and I.N.F.N., Via Celoria 16, 20133 Milano, Italy
Dept. of Physics, Princeton University, Jadwin Hall, Washington Rd, NJ 08544-0708 Princeton, USA
Dept. of Physics, Queens University Stirling Hall, K7L 3N6 Kingston, Ontario, Canada
Technische Universitaet Muenchen, James Franck Strasse E15, 85747 Garching, Germany
Joint Institute for Nuclear Research, 141980 Dubna, Russia
Dept. of Physics Massachusetts Institute of Technology, MA 02139 Cambridge, USA
Dipartimento di Chimica, Universitá, Perugia, Via Elce di Sotto 8, 06123 Perugia, Italy
RRC Kurchatov Institute, Kurchatov Sq. 1, 123182 Moscow, Russia
Dipartimento di Fisica Universitá and I.N.F.N., Genova, Via Dodecaneso 33, 16146 Genova, Italy
KFKI-RMKI, Konkoly Thege ut 29-33, 1121 Budapest, Hungary
Bell Laboratories, Lucent Technologies, NJ 07974-2070 Murray Hill, USA
M .Smoluchowski Institute of Physics, Jagellonian University, 30059 Krakow, Poland
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