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Development of a method to measure trace level of uranium and thorium in scintillation films
K. Ichimura, K. Chiba, Y. Gando +7
We have established a method to measure picograms-per-gram (pg g) levels of U and Th in scintillation films by combining the dry ashing method and inductivel…
Development of a low-background HPGe detector at Kamioka Observatory
K. Ichimura, H. Ikeda, Y. Kishimoto +9
A new ultra-low background high-purity germanium (HPGe) detector has been installed at the Kamioka underground experimental site. The background count rate in the energy range from…
The nylon balloon for xenon loaded liquid scintillator in KamLAND-Zen 800 neutrinoless double-beta decay search experiment
Zen collaboration, Y. Gando, A. Gando +70
The KamLAND-Zen 800 experiment is searching for the neutrinoless double-beta decay of Xe by using Xe-loaded liquid scintillator. The liquid scintillator is enclosed…
Neutrinoless double beta decay search with liquid scintillator experiments
Yoshihito Gando
Liquid scintillator experiments for neutrinoless double beta decay search have high sensitivity based on the ultra low background environment and high scalability. This paper descr…
Scintillation Balloon for Neutrinoless Double-Beta Decay Search with Liquid Scintillator Detectors
S. Obara, Y. Gando, K. Ishidoshiro
Environmental radioactivity is a dominant background for rare decay search experiments, and it is difficult to completely remove such an impurity from detector vessels. We propose…
A compact ultra-clean system for deploying radioactive sources inside the KamLAND detector
T. I. Banks, S. J. Freedman, J. Wallig +54
We describe a compact, ultra-clean device used to deploy radioactive sources along the vertical axis of the KamLAND liquid-scintillator neutrino detector for purposes of calibratio…