Search Results - "Narumi, Kazumasa"

Characterization of a Gafchromic film for the two-dimensional profile measurement of low-energy heavy-ion beams by Yuri, Yosuke, Narumi, Kazumasa, Yuyama, Takahiro

“…The feasibility of the transverse intensity distribution measurement of low-energy (keV/u range) heavy-ion beams using radiochromic films is experimentally…”
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Ion tracks in silicon formed by much lower energy deposition than the track formation threshold by Amekura, H., Toulemonde, M., Narumi, K., Li, R., Chiba, A., Hirano, Y., Yamada, K., Yamamoto, S., Ishikawa, N., Okubo, N., Saitoh, Y.

“…Damaged regions of cylindrical shapes called ion tracks, typically in nano-meters wide and tens micro-meters long, are formed along the ion trajectories in…”
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Proton-Cluster-Beam Lethality and Mutagenicity in Bacillus subtilis Spores by Hase, Yoshihiro, Satoh, Katsuya, Chiba, Atsuya, Hirano, Yoshimi, Moribayashi, Kengo, Narumi, Kazumasa

“…The unique energy transfer characteristics of swift cluster ions have attracted the attention of many researchers working on the analysis or processing of…”
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Sputtering Yields of Si Bombarded with 10–540-keV C60 Ions by Narumi, Kazumasa, Naramoto, Hiroshi, Yamada, Keisuke, Chiba, Atsuya, Saitoh, Yuichi

“…Sputtering yields of Si have been measured for C60 ions in the energy range from 10 to 540 keV, where the nuclear stopping is dominant, by measuring thickness…”
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Metallic Ca Aggregates Formed Along Ion Tracks and Optical Anisotropy in CaF2 Crystals Irradiated with Swift Heavy Ions by Amekura, Hiroshi, Ishikawa, Norito, Okubo, Nariaki, Chen, Feng, Narumi, Kazumasa, Chiba, Atsuya, Hirano, Yoshimi, Yamada, Keisuke, Yamamoto, Shunya, Saitoh, Yuichi

“…It is known that swift heavy ion (SHI) irradiation induces the shape elongation of metal nanoparticles (NPs) embedded in transparent insulators, which results…”
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Novel Approaches for Intensifying Negative C60 Ion Beams Using Conventional Ion Sources Installed on a Tandem Accelerator by Chiba, Atsuya, Usui, Aya, Hirano, Yoshimi, Yamada, Keisuke, Narumi, Kazumasa, Saitoh, Yuichi

“…We developed novel methods for producing negative C60 ion beams at the accelerator facility Takasaki Ion Accelerators for Advanced Radiation Application…”
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0.12–0.54 MeV C60 ion impacts on a poly(methyl methacrylate) target: Characterization through emission properties of negative secondary ions by Hirata, K., Yamada, K., Chiba, A., Hirano, Y., Narumi, K., Saitoh, Y.

“…The impacts of C60 ions on a poly(methyl methacrylate) target in the energy range of 0.12–0.54 MeV were characterized by analysis of negative secondary ion…”
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Incident Angle Dependent Formation of Ion Tracks in Quartz Crystal with C60+ Ions: Big Ions in Small Channels by Amekura, Hiroshi, Narumi, Kazumasa, Chiba, Atsuya, Hirano, Yoshimi, Yamada, Keisuke, Yamamoto, Shunya, Saitoh, Yuichi

“…Quartz (SiO2) crystals possess intrinsic columnar pores perpendicular to (0001) surfaces, consisting of three- and six-membered ring (3MR and 6MR) structures…”
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Fluence enhancement of a 4 MeV-C4+ ion beam transmitted through a cylindrical glass channel after charging by Motohashi, Kenji, Miyawaki, Nobumasa, Narumi, Kazumasa, Saitoh, Yuichi

“…We have developed a glass channel to guide ions heavier than protons and alpha particles with kinetic energies of several MeVs. The fluence of a 4 MeV-C4+ ion…”
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Experimental Study on the Biological Effect of Cluster Ion Beams in Bacillus subtilis Spores by Hase, Yoshihiro, Satoh, Katsuya, Chiba, Atsuya, Hirano, Yoshimi, Tomita, Shigeo, Saito, Yuichi, Narumi, Kazumasa

“…Cluster ion beams have unique features in energy deposition, but their biological effects are yet to be examined. In this study, we employed bacterial spores…”
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Tunnel magnetoresistance in Co nanoparticle/Co–C60 compound hybrid system by Sakai, Seiji, Yakushiji, Kay, Mitani, Seiji, Takanashi, Koki, Naramoto, Hiroshi, Avramov, Pavel V., Narumi, Kazumasa, Lavrentiev, Vasily, Maeda, Yoshihito

“…A nanometer-scale hybrid film of Co particle/Co–C60 compound was prepared by alternate deposition of Co and C60 under UHV condition. All of Raman spectra,…”
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Axial orientation of molecular-beam-epitaxy-grown Fe3Si∕Ge hybrid structures and its degradation by Maeda, Yoshihito, Jonishi, Takafumi, Narumi, Kazumasa, Ando, Yu-ichiro, Ueda, Koji, Kumano, Mamoru, Sadoh, Taizoh, Miyao, Masanobu

“…The axial orientation of molecular-beam-epitaxy (MBE)-grown Fe3Si(111)∕Ge(111) hybrid structures was investigated by Rutherford backscattering spectroscopy. We…”
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Polymerization of solid C60 under C+60 cluster ion bombardment by LAVRENTIEV, Vasily, VACIK, Jiri, NARAMOTO, Hiroshi, NARUMI, Kazumasa

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Comparative study of structures and electrical properties in cobalt–fullerene mixtures by systematic change of cobalt content by Sakai, Seiji, Naramoto, Hiroshi, Avramov, Pavel V., Yaita, Tsuyoshi, Lavrentiev, Vasily, Narumi, Kazumasa, Baba, Yuji, Maeda, Yoshihito

“…A systematic study is performed for the Co content-dependent structure evolution and electrical properties in the cobalt (Co)–fullerene (C 60) mixtures in the…”
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Controllable fabrication of amorphous Si layer by energetic cluster ion bombardment by Lavrentiev, Vasily, Vorliček, Vladimir, Dejneka, Alexandr, Chvostova, Dagmar, Jäger, Aleš, Vacik, Jiri, Jastrabik, Lubomir, Naramoto, Hiroshi, Narumi, Kazumasa

“…We report on the fabrication of an amorphous Si (a-Si) thin layer by means of bombardment of a Si(100) surface using monoenergetic C60 cluster ions with…”
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Atomically controlled hetero-epitaxy of Fe3Si/SiGe for spintronics application by MIYAO, Masanobu, UEDA, Koji, ANDO, Yu-Ichiro, KUMANO, Mamoru, SADOH, Taizoh, NARUMI, Kazumasa, MAEDA, Yoshihito

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Quantum Chemical Study of Atomic Structure Evolution of Cox/C60 (x ≤ 2.8) Composites by AVRAMOV, Pavel, NARAMOTO, Hiroshi, SAKAI, Seiji, NARUMI, Kazumasa, LAVRENTIEV, Vasily, MAEDA, Yoshihito

“…The main features of the local atomic structure of novel Cox/C60 (x<or=2.8) complex mixtures were studied using the ab initio B3LYP/6-31G* method for a set of…”
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Calculation study of selective ion extraction from ion source with Paul-trap-type laser cooling device by Miyawaki, Nobumasa, Ishii, Yasuyuki, Yuri, Yosuke, Narumi, Kazumasa, Muroo, Kento, Ito, Kiyokazu, Okamoto, Hiromi

“…A single-ion implantation (SII) system combining a laser-cooled linear-Paul-trap ion source (LPT-IS) and a two-stage acceleration lens is being developed to…”
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Polymeric Co-C60 Compound Phase Evolved in Atomistically Mixed Thin Films by Sakai, Seiji, Naramoto, Hiroshi, Lavrentiev, Vasily, Narumi, Kazumasa, Maekawa, Masaki, Kawasuso, Atsuo, Yaita, Tsuyoshi, Baba, Yuji

“…A systematic study of the atom-level mixtures between Co and C60 has made possible to find a new C60-based compound phase, CoxC60 (x≤5). It is confirmed with…”
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Energy Spectra of Electrons Induced by MeV Atom Clusters by Kudo, Hiroshi, Iwazaki, Wataru, Uchiyama, Rumi, Tomita, Shigeo, Shima, Kunihiro, Sasa, Kimikazu, Ishii, Satoshi, Narumi, Kazumasa, Naramoto, Hiroshi, Saitoh, Yuichi, Yamamoto, Shunya, Kaneko, Toshiaki

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