Publications (13)
XMASS detector
K. Abe, K. Hieda, K. Hiraide +45
The XMASS project aims to detect dark matter, pp and Be solar neutrinos, and neutrinoless double beta decay using ultra pure liquid xenon. The first phase of the XMASS experi…
CeLAND: search for a 4th light neutrino state with a 3 PBq 144Ce-144Pr electron antineutrino generator in KamLAND
A. Gando, Y. Gando, S. Hayashida +63
The reactor neutrino and gallium anomalies can be tested with a 3-4 PBq (75-100 kCi scale) 144Ce-144Pr antineutrino beta-source deployed at the center or next to a large low-backgr…
Search for solar axions in XMASS, a large liquid-xenon detector
K. Abe, K. Hieda, K. Hiraide +43
XMASS, a low-background, large liquid-xenon detector, was used to search for solar axions that would be produced by bremsstrahlung and Compton effects in the Sun. With an exposure…
Study of electron anti-neutrinos associated with gamma-ray bursts using KamLAND
K. Asakura, A. Gando, Y. Gando +45
We search for electron anti-neutrinos () from long and short-duration gamma-ray bursts~(GRBs) using data taken by the KamLAND detector from August 2002 to June 2013.…
Self-shielding effect of a single phase liquid xenon detector for direct dark matter search
A. Minamino, K. Abe, Y. Ashie +41
Liquid xenon is a suitable material for a dark matter search. For future large scale experiments, single phase detectors are attractive due to their simple configuration and scalab…
Distillation of Liquid Xenon to Remove Krypton
K. Abe, J. Hosaka, T. Iida +45
A high performance distillation system to remove krypton from xenon was constructed, and a purity level of Kr/Xe = was achieved. This development is crucia…
Light WIMP search in XMASS
K. Abe, K. Hieda, K. Hiraide +43
A search for light dark matter using low-threshold data from the single phase liquid xenon scintillation detector XMASS, has been conducted. Using the entire 835 kg inner volume as…
7Be Solar Neutrino Measurement with KamLAND
A. Gando, Y. Gando, H. Hanakago +68
We report a measurement of the neutrino-electron elastic scattering rate of 862 keV 7Be solar neutrinos based on a 165.4 kton-day exposure of KamLAND. The observed rate is 582 +/-…
Scintillation yield of liquid xenon at room temperature
K. Ueshima, K. Abe, T. Iida +41
The intensity of scintillation light emission from liquid xenon at room temperature was measured. The scintillation light yield at 1 deg. was measured to be 0.64 +/- 0.02 (stat.) +…
Search for double-beta decay of 136Xe to excited states of 136Ba with the KamLAND-Zen experiment
Zen Collaboration, K. Asakura, A. Gando +42
A search for double-beta decays of 136Xe to excited states of 136Ba has been performed with the first phase data set of the KamLAND-Zen experiment. The 0+1, 2+1 and 2+2 transitions…
Scintillation-only Based Pulse Shape Discrimination for Nuclear and Electron Recoils in Liquid Xenon
K. Ueshima, K. Abe, K. Hiraide +34
In a dedicated test setup at the Kamioka Observatory we studied pulse shape discrimination (PSD) in liquid xenon (LXe) for dark matter searches. PSD in LXe was based on the observa…
KamLAND Sensitivity to Neutrinos from Pre-Supernova Stars
K. Asakura, A. Gando, Y. Gando +44
In the late stages of nuclear burning for massive stars ($M>8~M_{\sun}$), the production of neutrino-antineutrino pairs through various processes becomes the dominant stellar cooli…
White paper: CeLAND - Investigation of the reactor antineutrino anomaly with an intense 144Ce-144Pr antineutrino source in KamLAND
A. Gando, Y. Gando, S. Hayashida +57
We propose to test for short baseline neutrino oscillations, implied by the recent reevaluation of the reactor antineutrino flux and by anomalous results from the gallium solar neu…