Laboratory Studies of Lead Removal from Liquid Scintillator in   Preparation for KamLAND's Low Background Phase
  The removal of Radon induced Lead from liquid scintillator was extensively studied in preparation for KamLAND's low background phase. This work presents the results from laboratory experiments performed at the University of Alabama and their implications for KamLAND and future low background experiments using carbon based liquid scintillator. It was observed that distillation was the most effective purification procedure and that one must consider a non-polar and non-ionic component of Lead in order to reach the levels of radio-purity required for these new class of ultra-low background experiments. 
Gregory Keefer
physics.ins-det hep-ex nucl-ex