Author:
Kamei Y.,Shimizu I.,Teraoka Y.,Yamamura T.,Shirasaki K.
Abstract
Abstract
Development of radio-purification for the large-volume
liquid scintillator detector is a key to enhance search
sensitivities in neutrino physics. In this paper, we describe
laboratory studies on the radio-purification of the liquid
scintillator detector by using the metal scavenger, aiming at the
improved search for the neutrinoless double beta decay in
KamLAND-Zen. In the purification tests, the 210Pb reduction
efficiency was evaluated. Based on the purification performance in
small-scale system, we designed a large adsorption column for the
metal scavenging applicable to the KamLAND purification system. We
produced the column and constructed a purification test bench, and
confirmed the 212Pb reduction efficiency, the process speed,
the LS contamination and quality changes, and the stability of
chemical components in the Xe-LS. We found that the metal scavenging
is a practical method for the large-volume LS purification, and will
be effective to reduce metallic radioactive elements.
Subject
Mathematical Physics,Instrumentation