Measuring cosmogenic Li9 background in a reactor neutrino experiment

Details Measuring cosmogenic Li9 background in a reactor neutrino experiment Measuring cosmogenic Li9 background in a reactor neutrino experiment

2006-04-17

arxiv.org/abs/hep-ex/0604034v1

Nucl.Instrum.Meth. A564 (2006) 471-474

Physics

High Energy Physics

High Energy Physics - Experiment

9 pages, 3 figures. To appear in NIM A

Scientific paper

10.1016/j.nima.2006.04.047

Cosmogenic isotopes 9Li and 8He produced in the detector are the most problematic background in the reactor neutrino experiments designed to determine precisely the neutrino mixing angle theta13. The average time interval of cosmic-ray muons in the detector is often on the order of the lifetimes of the 9Li and 8He isotopes. We have developed a method for determining this kind of background from the distribution of time since last muon for muon rate up to about 20 Hz when the background-to-signal ratio is small, on the order of a few percents.

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