Laboratory Studies on the Removal of Radon-Born Lead from KamLAND's Organic Liquid Scintillator
G. Keefer, C. Grant, A. Piepke, T. Ebihara, H. Ikeda, Y. Kishimoto, Y., Kibe, Y. Koseki, M. Ogawa, J. Shirai, S. Takeuchi, C. Mauger, C. Zhang, G., Schweitzer, B.E. Berger, S. Dazeley, M.P. Decowski, J. A. Detwiler, Z., Djurcic, D. A. Dwyer, Y. Efremenko, S. Enomoto
TL;DR
This study evaluates methods for removing radon decay products from KamLAND's liquid scintillator, identifying distillation as the most effective technique for reducing radioactivity in preparation for low-background experiments.
Contribution
It introduces and compares extraction techniques for radon daughter removal, highlighting distillation as the most efficient method.
Findings
Distillation achieved the highest reduction factors for radon daughters.
Various extraction methods were systematically tested and compared.
The results support using distillation to lower radioactivity in liquid scintillators.
Abstract
The removal of radioactivity from liquid scintillator has been studied in preparation of a low background phase of KamLAND. This paper describes the methods and techniques developed to measure and efficiently extract radon decay products from liquid scintillator. We report the radio-isotope reduction factors obtained when applying various extraction methods. During this study, distillation was identified as the most efficient method for removing radon daughters from liquid scintillator.
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Taxonomy
TopicsNeutrino Physics Research · Particle physics theoretical and experimental studies · Radiation Detection and Scintillator Technologies