Prompt energy calibration at RENO

RENO (Reactor Experiment for Neutrino Oscillation) has obtained the first measured value of effective neutrino mass difference from a spectral analysis of reactor neutrino disappearance. The measurement absolutely relies on the accurate energy calibration. Several radioactive sources such as 137Cs,...

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Bibliographic Details
Published inJournal of physics. Conference series Vol. 888; no. 1; pp. 12136 - 12138
Main Author KIM, Sang Yong
Format Journal Article
LanguageEnglish
Published Bristol IOP Publishing 01.09.2017
Subjects
Calibration
Cerenkov radiation
Cesium 137
Cesium isotopes
Energy
Energy conversion
Neutrinos
Nonlinear response
Physics
Radioisotopes
Scintillation counters
Spectrum analysis
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Summary:RENO (Reactor Experiment for Neutrino Oscillation) has obtained the first measured value of effective neutrino mass difference from a spectral analysis of reactor neutrino disappearance. The measurement absolutely relies on the accurate energy calibration. Several radioactive sources such as 137Cs, 54Mn, 68Ge, 65Zn, 60Co, Po-Be, Am-Be, and Cf-Ni, are used for the energy calibration of the RENO detectors. We obtained an energy conversion function from observed charges to prompt signal energy which describes a non-linear response due to the quenching effect in liquid scintillator and Cherenkov radiation. We have verified the performance of the energy calibration using copious betadecay events from radioactive isotopes B12 that are produced by cosmic-muon interaction. The energy calibration was performed for the target and gamma-catcher regions separately due to their different energy responses. In this presentation we describe the methods and results of the energy calibration.
ISSN:1742-6588
1742-6596
DOI:10.1088/1742-6596/888/1/012136