A5043278290- Neutrino Physics Research
- Particle physics theoretical and experimental studies
- Astrophysics and Cosmic Phenomena
- Planetary Science and Exploration
- Nuclear Physics and Applications
- Radiation Detection and Scintillator Technologies
- Astro and Planetary Science
- Diamond and Carbon-based Materials Research
- Ion-surface interactions and analysis
- Semiconductor materials and devices
- Dental Health and Care Utilization
- Radiation Effects in Electronics
- Particle Detector Development and Performance
- Dental Erosion and Treatment
- Dark Matter and Cosmic Phenomena
- Dental materials and restorations
- X-ray Spectroscopy and Fluorescence Analysis
- Atomic and Subatomic Physics Research
- Advanced NMR Techniques and Applications
- Gamma-ray bursts and supernovae
- Hydrogen Storage and Materials
- Muon and positron interactions and applications
- Nuclear physics research studies
- Advanced Battery Technologies Research
- Advancements in Battery Materials
Foundation Wakasa Wan Energy Research Center
2015-2023
Osaka University
2014-2022
University of Fukui
2020
Tohoku University
2017
Aoyama Gakuin University
2008
Lead halide perovskite single layers with three grain sizes are subjected to proton-beam irradiation in order assess the durability and radiation tolerance of solar cells (PSCs) against space radiation. Proton-beam is chosen because proton beams significantly affect cell performance environment. We evaluate effects by focusing on structure, crystal carrier lifetime a layer using scanning electron microscopy, X-ray diffraction, photoluminescence (PL) spectra, time-resolved PL (TRPL). The...
The observation of neutrino-less double beta decay (0vßß) would be the most practical way to prove Majorana nature neutrino and lepton number violation. CANDLES studies 48Ca using CaF2 scintillator. main advantage is that it has highest Q-value (4.27 MeV) among all isotope candidates for 0vßß.
Abstract CANDLES(CAlcium fluoride for the study of Neutrinos and Dark matters by Low Energy Spectrometer) is experiment to search neutrino-less double beta decay(0 vββ ) 48 Ca with CaF 2 scintillator. has highest Q ββ -value (4.3 MeV) among all isotope candidates 0 . It enables us measure signals very low background condition. After rejection analysis 131 days × 86 kg data events from radioactive contaminations in scintillators, no are observed region. As a result, half-life greater than 6.2...
CANDLES is the project to search for neutrino-less double beta decay (0νββ) of 48Ca. The observation 0νββ will prove existence a massive Majorana neutrino. For measurement, we need low background condition because rate 0νββ. Now installed III system at Kamioka underground laboratory. realizes by characteristic structure and data analyses rejection. Here report performances system.
CANDLES is the project to search for neutrino-less double beta decay (0νββ) of 48Ca. The observation 0νββ will prove existence a massive Majorana neutrino. For measurement, we need low background condition because rate 0νββ. Now installed III system at Kamioka underground laboratory. realizes by characteristic structure and data analyses rejection. Here report performances system.
We have determined the distribution of aluminum in epidermal cells mature tea leaves using micro-beam particle-induced X-ray emission. The observed pattern suggests that exists cell walls. Silicon exhibits a is nearly identical to aluminum, suggesting co-localization with aluminum.
A new data acquisition (DAQ) system for the CANDLES experiment was developed using SpaceWire protocol and DAQ-Middleware framework. The uses a trigger board Flash Analog-to-Digital Converters (FADCs). helps us construct DAQ with flexible multi-path access to FADCs board. have ring buffer three buffers detect sequential decays from backgrounds. We parallel read-out reduce dead time at high rates personal computers (PCs) that are connected in one by one. Each PC connects all gathers complete...
A new $\mu$TCA DAQ system was introduced in CANDLES experiment with SpaceWire-to-GigabitEthernet (SpaceWire-GigabitEthernet) network for data readout and Flash Analog-to-Digital Converters (FADCs). With SpaceWire-GigabitEthernet, we can construct a flexible multi-path access to FADCs by using off-the-shelf computers. are equipped 8 event buffers, which act as de-randomizer detect sequential decays from the background. SpaceWire-GigabitEthernet has high latency (about 100 $\mu$sec) due long...
This study aimed to use an in-air micro-particle-induced X-ray/gamma emission (in-air µPIXE/PIGE) system evaluate tooth-bound fluoride (T-F) in dentin following the application of fluoride-containing tooth-coating materials. Three coating materials (PRG Barrier Coat, Clinpro XT varnish, and Fuji IX EXTRA) a control were applied root surface human molars (n = 6, total 48 samples). Samples stored remineralizing solution (pH 7.0) for 7 or 28 days then sectioned into two adjacent slices. One...
The core facility of the Wakasa Wan Energy Research Center (WERC) consists three ion accelerators: a synchrotron, tandem accelerator and an ion-implanter. on irradiation effects using these accelerators has been performed space electronics such as solar cells, radiation detectors, image sensors LSI circuits. In this report, ion-irradiation apparatuses at WERC are introduced, focusing research electronics. Then, some recent results summarized.
Ceramics such as Li2ZrO3 and Li4SiO4 have interesting features of water vapor carbon dioxide absorption. However, the mechanism absorption catalysis is not well understood. The element behavior in ceramics was measured using ion beam analysis. To measure hydrogen other light quantities distribution ceramics, in-air time-of-flight elastic recoil detection analyses were performed. Hydrogen quantity compared with PET film by Carbon observed analysis, lithium oxygen distributions on surface kept...
We investigated the effects of irradiation beam conditions on performance degradation silicon and triple-junction solar cells for use in space. The fluence rates electron proton beams were varied. Degradation did not depend rate protons both cells. A higher electrons caused greater Si cell, but dependence was due to temperature increase during irradiation. Two beam-area expansion methods, defocusing scanning, examined various energies (50 keV–10 MeV). In comparing output from with defocused...
The neutrino-less double beta decay is acquiring great interest after the confirmation of neutrino oscillation which demonstrated nonzero mass. In order to search for $^{48}$Ca, we proposed CANDLES project by using CaF$_{2}$(pure) scintillators. Now installed III system at Kamioka underground laboratory. realizes low background condition a characteristic structure and data analyses rejection. Furthermore new shielding in reduce $\gamma$-ray backgrounds from neutron capture reaction. Here...
CANDLES is a double beta decay experiment using 48Ca in CaF2 crystals. The measurement being performed with prototype detector (CANDLES III) for high sensitive the future. Recent status of improvements and background reduction techniques are described this paper.
Tooth-bound (KOH-insoluble) fluoride contributes to caries prevention because of its low acid solubility and long retention within tooth structure. The purpose this study was evaluate tooth-bound in dentin, taken up from fluoride-containing luting materials, using an in-air [Formula: see text]PIXE/PIGE system. dentin surface root cross-sections acrylic resin were cemented with four different materials. Specimens stored a remineralizing solution for 4 or 8 weeks then sectioned into two...
In a neutrinoless double-beta decay ( 0νββ ) experiment, energy resolution is important to distinguish between and background events. Calcium fluoride for studies of Neutrino Dark matters by Low Energy Spectrometer (CANDLES) discerns the <sup xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">48</sup> Ca using CaF <sub xmlns:xlink="http://www.w3.org/1999/xlink">2</sub> scintillator as detector source. Photomultiplier tubes (PMTs) collect scintillation...