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A study of reactor neutrino monitoring at the experimental fast reactor JOYO |
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| Authors: | H Furuta Y FukudaT Hara T Haruna N IshiharaM Ishitsuka C ItoM Katsumata T KawasakiT Konno M KuzeJ Maeda T MatsubaraH Miyata Y NagasakaK Nitta Y SakamotoF Suekane T SumiyoshiH Tabata M TakamatsuN Tamura |
| Affiliation: | a Department of Physics, Tokyo Institute of Technology, Tokyo 152-8551, Japan b Department of Physics, Miyagi University of Education, Sendai 980-0845, Japan c Department of Physics, Kobe University, Kobe 657-8501, Japan d Department of Physics, Tokyo Metropolitan University, Hachioji 192-0397, Japan e Institute of Particle and Nuclear Studies, High Energy Accelerator Research Organization (KEK), Tsukuba 305-0801, Japan f Experimental Fast Reactor Department, Oarai Research and Development Center, Japan Atomic Energy Agency (JAEA), Oarai 311-1393, Japan g Department of Physics, Niigata University, Niigata 950-2181, Japan h Department of Computer Science, Hiroshima Institute of Technology, Hiroshima 731-5193, Japan i Department of Information Science, Tohoku Gakuin University, Sendai 981-3193, Japan j Department of Physics, Tohoku University, Sendai 980-8578, Japan |
| Abstract: | We carried out a study of neutrino detection at the experimental fast reactor JOYO using a 0.76 tons gadolinium loaded liquid scintillator detector. The detector was set up on the ground level at 24.3 m from the JOYO reactor core of 140 MW thermal power. The measured neutrino event rate from reactor on-off comparison was 1.11±1.24(stat.)±0.46(syst.) events/day. Although the statistical significance of the measurement was not enough, backgrounds in such a compact detector at the ground level were studied in detail and MC simulations were found to describe the data well. A study for improvement of the detector for future such experiments is also shown. |
| Keywords: | Reactor neutrino Neutrino oscillation Cosmic ray Radioactivity Low background |
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