Publications by authors named "Y Mizumura"
Here we describe the diastereoselective synthesis of (5r,8r)-1,9-diazadispiro[4.2.4 .
View Article and Find Full Text PDFDye-sensitized solar cells employing nonvolatile liquid-crystalline (LC) electrolytes that form nanostructures capable of efficient ion transport are reported. The LC electrolyte consists of a cyclic carbonate-functionalized mesogen and an iodide-based ionic liquid that nanosegregates into lamellar structures exhibiting over four times higher ion conductivities parallel to the layers than perpendicular to the layers. The self-assembled ion pathways allow efficient ion transport in the semi-solid LC state.
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- We developed an Electron Tracking Compton Camera (ETCC) that accurately measures the brightness and spectrum of MeV gamma-rays, achieving a defined Point Spread Function (PSF) for the first time.
- Our pilot gamma-imaging-spectroscopy tests at contaminated sites near Fukushima in 2014 showed that the brightness data could be converted into consistent dose distribution measurements compared to traditional dosimeter methods.
- The ETCC effectively identified complex radioactive features and a "micro hot spot" of caesium contamination, demonstrating its capabilities and potential applications in various fields such as nuclear safety, medicine, and astronomy.
Since the discovery of nuclear gamma-rays, its imaging has been limited to pseudo imaging, such as Compton Camera (CC) and coded mask. Pseudo imaging does not keep physical information (intensity, or brightness in Optics) along a ray, and thus is capable of no more than qualitative imaging of bright objects. To attain quantitative imaging, cameras that realize geometrical optics is essential, which would be, for nuclear MeV gammas, only possible via complete reconstruction of the Compton process.
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