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Izumi Murakami
Researcher at National Institutes of Natural Sciences, Japan
Publications - 166
Citations - 1825
Izumi Murakami is an academic researcher from National Institutes of Natural Sciences, Japan. The author has contributed to research in topics: Ion & Large Helical Device. The author has an hindex of 19, co-authored 155 publications receiving 1542 citations. Previous affiliations of Izumi Murakami include Graduate University for Advanced Studies.
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Density evaluation of tungsten W24+, W25+, and W26+ ions using unresolved transition array at 27-34 Å in Large Helical Device
TL;DR: In this paper, the ion density of W24+, W25+, and W26+ ions was evaluated from the radial profile measured at the above-mentioned wavelength intervals, where the electron density and the number of tungsten particles injected by the tengsten pellet were investigated.
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Total, Partial, and Differential Ionization Cross Sections in Proton–Hydrogen Atom Collisions in the Energy Region of 0.1–10 keV/u
TL;DR: In this paper, single-differential, partial, and total ionization cross sections for the proton-hydrogen atom collision system in the energy region of 0.1-10 keV/u are determined by using the molecular-orbital close-coupling method within a semiclassical formalism.
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Intensity ratio of EUV emission lines in Fe XV studied with electron beam ion traps
Erina Shimizu,Hiroyuki A. Sakaue,Daiji Kato,Izumi Murakami,Norimasa Yamamoto,Hirohisa Hara,Tetsuya Watanabe,Nobuyuki Nakamura +7 more
TL;DR: In this article, the emission spectra of highly charged Fe ions in the extreme ultraviolet range obtained with two electron beam ion traps was analyzed and it was shown that the discrepancy is not due to line blending.
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Resonant Electron Impact Excitation of 3d Levels in Fe14+ and Fe15+
Takashi Tsuda,Erina Shimizu,Safdar Ali,Hiroyuki A. Sakaue,Daiji Kato,Izumi Murakami,Hirohisa Hara,Tetsuya Watanabe,Nobuyuki Nakamura +8 more
TL;DR: In this article, the experimental results are compared with theoretical cross sections calculated based on fully relativistic wave functions and the distorted wave approximation for the resonance strength of 3p-3d transitions in Fe14+ and Fe15+ excited with a mono-energetic electron beam.
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Analysis of Fe XXI Spectral Lines Measured in LHD Plasma
Izumi Murakami,Hiroyuki A. Sakaue,Norimasa Yamamoto,Daiji Kato,Shigeru Morita,Tetsuya Watanabe +5 more
TL;DR: In this article, the electron density dependence of the line intensity ratio, which is the result of the excitation process among the fine-structure levels of the ground state, 2s22p2 3PJ by electron and proton impact, was estimated.