Institution
Shonan Institute of Technology
Education•Fujisawa, Japan•
About: Shonan Institute of Technology is a education organization based out in Fujisawa, Japan. It is known for research contribution in the topics: Air shower & Cosmic ray. The organization has 638 authors who have published 1376 publications receiving 14585 citations. The organization is also known as: Shonan Koka Daigaku.
Topics: Air shower, Cosmic ray, Thin film, Thermoelectric effect, Holography
Papers published on a yearly basis
Papers
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TL;DR: Results indicate that defects responsible for these luminescence bands are diamagnetic defects introduced during preparation or paramagnetic species induced during excitation.
Abstract: Photoluminescence under 7.9-eV excimer-laser excitation was measured at room temperature on various types of high-purity silica glasses, which were classified based on the oxygen stoichiometry and OH concentrations. Several luminescence bands with different peak energies from 1.9 to 4.3 eV and decay constants were observed in different types of silicas. The 1.9-eV band was observed in low-OH oxygen-surplus and high-OH silicas. The 2.7-eV band was observed only in low-OH oxygen-deficient silicas. The 3.1- and the 4.2-eV bands were observed in a particular type of silica, which has a characteristic absorption band at 5.1 eV (referred to as the ${\mathit{B}}_{2}$\ensuremath{\beta} band). The 4.3-eV band was observed in all types of silicas but the oxygen-surplus type. These results indicate that defects responsible for these luminescence bands are diamagnetic defects introduced during preparation or paramagnetic species induced during excitation.
369 citations
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TL;DR: Observation of the decay lifetime of photoluminescence and calculations using the ab initio molecular-orbital program show that the 7.6-eV band is caused by a singlet-to-singlet transition, while the 5.0-ev band is cause by a singslet- to-triplet transition.
Abstract: Various uv and vacuum-uv optical-absorption bands found in as-manufactured high-purity ${\mathrm{SiO}}_{2}$ glass were studied. Two types of absorption bands were found near 5.0 eV, one of which is attributed to the oxygen vacancy (?Si-Si?). The absorption band at 7.6 eV is also found to be caused by the same oxygen vacancy. Observation of the decay lifetime of photoluminescence and calculations using the ab initio molecular-orbital program show that the 7.6-eV band is caused by a singlet-to-singlet transition, while the 5.0-eV band is caused by a singlet-to-triplet transition.
262 citations
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Hirosaki University1, Saitama University2, Chinese Academy of Sciences3, Yokohama National University4, Hebei Normal University5, Tibet University6, Shandong University7, Southwest Jiaotong University8, Yunnan University9, Kanagawa University10, Utsunomiya University11, University of Tokyo12, Konan University13, Shibaura Institute of Technology14, Shinshu University15, Tsinghua University16, Waseda University17, National Institute of Informatics18, College of Industrial Technology19, Shonan Institute of Technology20
TL;DR: Two-dimensional high-precision anisotropy measurement for energies from a few to several hundred teraelectronvolts (TeV) is presented, using the large data sample of the Tibet Air Shower Arrays, revealing finer details of the known anisotropies.
Abstract: The intensity of Galactic cosmic rays is nearly isotropic because of the influence of magnetic fields in the Milky Way. Here, we present two-dimensional high-precision anisotropy measurement for energies from a few to several hundred teraelectronvolts (TeV), using the large data sample of the Tibet Air Shower Arrays. Besides revealing finer details of the known anisotropies, a new component of Galactic cosmic ray anisotropy in sidereal time is uncovered around the Cygnus region direction. For cosmic-ray energies up to a few hundred TeV, all components of anisotropies fade away, showing a corotation of Galactic cosmic rays with the local Galactic magnetic environment. These results have broad implications for a comprehensive understanding of cosmic rays, supernovae, magnetic fields, and heliospheric and Galactic dynamic environments.
259 citations
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230 citations
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TL;DR: In this paper, optical absorption and photoluminescence measurements of the 19eV emission, excited by various excitation bands, were carried out on high-purity silica glasses subjected to γ-ray irradiation.
Abstract: Optical absorption measurements of the 20‐eV band and photoluminescence measurements of the 19‐eV emission, excited by various excitation bands, were carried out on high‐purity silica glasses subjected to γ‐ray irradiation Two, and possibly three, different forms of nonbridging oxygen hole centers were deconvoluted from the results of the isochronal annealing experiments The difference in the peak wavelength of the 20‐eV absorption and 19‐eV luminescence bands among various forms of nonbridging oxygen hole centers is reported
215 citations
Authors
Showing all 639 results
Name | H-index | Papers | Citations |
---|---|---|---|
Isao Ando | 41 | 470 | 8315 |
Toshiki Makimoto | 40 | 231 | 6433 |
Makoto Kasu | 39 | 192 | 6327 |
Masaaki Kobayashi | 32 | 126 | 3435 |
Mitsuru Ishii | 29 | 83 | 2378 |
Hisamatsu Nakano | 28 | 174 | 3400 |
Fan Wu | 27 | 42 | 2445 |
H. Sugimoto | 25 | 115 | 2268 |
Yoshitaka Taniyasu | 24 | 74 | 3133 |
Kazuhide Kumakura | 24 | 119 | 2230 |
Hirotaka Ono | 24 | 141 | 1865 |
Akihisa Ohya | 23 | 152 | 1512 |
Nobuo Matsumoto | 21 | 74 | 1399 |
Kazutaka Terashima | 21 | 138 | 1612 |
Kaya Nagasawa | 20 | 47 | 2080 |