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Journal Articles

Structure analysis of two-dimensional atomic sheets by total-reflection high-energy positron diffraction

Fukaya, Yuki

e-Journal of Surface Science and Nanotechnology (Internet), 16, p.111 - 114, 2018/04

no abstracts in English

Journal Articles

Ion desorption from bulk cesium chloride at moderate temperature ($$<$$500$$^{circ}$$C) under electric field

Baba, Yuji; Shimoyama, Iwao

e-Journal of Surface Science and Nanotechnology (Internet), 16, p.53 - 59, 2018/03

Surface ionization for cesium chloride and Cs-adsorbed soil has been investigated. For cesium chloride, neutral cesium was desorbed around 645$$^{circ}$$C which is close to the melting point of cesium. While Cs$$^{+}$$ ion was desorbed from 400$$^{circ}$$C. The ratio of desorbed ions and neutrals (Cs$$^{+}$$/Cs$$^{0}$$) has a maximum around 410 $$^{circ}$$C. Temperature dependence of Cs$$^{+}$$/Cs$$^{0}$$ was analyzed using Saha-Langmuir equation, As a result, it was found that the temperature maximum is due to the changes of the surface work function induced by the phase transition of CsCl.

Oral presentation

Initial oxidation of copper alloy surfaces with a hyperthermal oxygen molecular beam

Tsuda, Yasutaka*; Makino, Takamasa*; Yoshida, Hikaru; Yoshigoe, Akitaka; Fukuyama, Tetsuya*; Okada, Michio*

no journal, , 

Initial stage of corrosion is one of the central topics in material science. In the present study, we report the results of oxidation on Cu$$_{3}$$Pd(111) and Cu$$_{3}$$Pt(111) with a hyperthermal O$$_{2}$$ molecular beam (HOMB) with variable incident energies, using X-ray photoemission spectroscopy in conjunction with synchrotron radiation. All experiments were performed using the Surface Reaction Analysis Apparatus constructed in BL23SU at SPring-8. The Cu$$_{3}$$Pd(111) and Cu$$_{3}$$Pt(111) samples were cleaned by Ar+ sputtering and annealing. The kinetic energy of the HOMB was set to be 2.3 eV. From the uptake curves, it was found that the oxidation of Cu$$_{3}$$Pt is less effective than that on Cu$$_{3}$$Au and Cu$$_{3}$$Pd. This suppression of the surface reactivity may be caused by the Pt-rich subsurface layer.

Oral presentation

Corrosion properties of sheath materials for MI cables under various gas conditions containing iodine gas

Nakano, Hiroko; Takeuchi, Tomoaki; Hirota, Noriaki; Tsuchiya, Kunihiko

no journal, , 

no abstracts in English

Oral presentation

Micro fluorescence X-ray characterization of structure and metamorphic in iron-rhodium alloys

Honda, Mitsunori; Shimoyama, Iwao; Okamoto, Yoshihiro; Soma, Ryunosuke*; Fukuda, Kengo*; Ochi, Masaaki*; Matsui, Toshiyuki*; Saito, Yuichi*; Iwase, Akihiro*

no journal, , 

Oral presentation

Consideration of molybdenum adsorption behavior of alumina by surface analysis

Suzuki, Yoshitaka; Niizeki, Tomotake*; Kitagawa, Tomoya*; Nishikata, Kaori; Matsukura, Minoru*; Hasegawa, Yoshio*; Tanase, Masakazu*; Fukumitsu, Nobuyoshi*; Yamauchi, Yusuke*; Ariga, Katsuhiko*; et al.

no journal, , 

no abstracts in English

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