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InO
Nagasaki, Takanori*; Shiotani, Shinya*; Igawa, Naoki; Yoshino, Masahito*; Iwasaki, Kota*; Fukazawa, Hiroshi; Utsumi, Wataru
Journal of Solid State Chemistry, 182(10), p.2632 - 2639, 2009/10
Times Cited Count：6 Percentile：23.67(Chemistry, Inorganic & Nuclear)We propose a new method, a difference maximum entropy method (MEM) analysis of the neutron diffraction data, for revealing the detailed structure around hydrogen atoms in proton-conducting oxides. This MEM analysis uses the differences between the structure factors of protium- and deuterium-dissolved crystals. Simulations demonstrate that it not only provides the distribution of hydrogen atoms alone, but also improves the spatial resolution of MEM mapping around hydrogen atoms. Applied to actual diffraction data of protium- and deuterium-dissolved BaSnInO at 9 K, difference MEM analysis reveals that O-D bonds mostly tilt towards the second nearest oxygen atoms, and that the distributions of deuterium and oxygen atoms are probably insignificant in interstitial regions.
Kudo, Hiroshi*; Iwasaki, Wataru*; Uchiyama, Rumi*; Tomita, Shigeo*; Shima, Kunihiro*; Sasa, Kimikazu*; Ishii, Satoshi*; Narumi, Kazumasa; Naramoto, Hiroshi; Saito, Yuichi; et al.
Japanese Journal of Applied Physics, Part 2, 45(22), p.L565 - L568, 2006/06
Times Cited Count：14 Percentile：47.09(Physics, Applied)The first observation of the energy distribution of electrons emitted from solids bombarded by MeV atom clusters is reported. In the backward direction, using graphite and Si bombarded by C
and Al (n 
8), an appreciable suppression of electron emission has been observed at electron energies lower than 
10 eV. Electron yield per atom decreases with increasing n, and becomes less than 50% at n 
3, relative to the case of n = 1. The experimental results cannot be explained in terms of projectile stopping cross sections nor by the clearing-the-way effect. It is probable that the suppressed electron emission is a result of the suppression of the transport or surface transmission of the produced low-energy electrons, rather than of the suppression of ionization.
Kudo, Hiroshi*; Iwasaki, Wataru*; Suguri, Takuya*; Saito, Yuichi; Yamamoto, Shunya; Narumi, Kazumasa; Naramoto, Hiroshi
JAERI-Review 2002-035, TIARA Annual Report 2001, p.214 - 216, 2002/11
no abstracts in English
O- and HO-dissolved Ba(Sn,In)O
proton conductors, 1; Theoretical basis and spatial resolution of difference MEM analysisNagasaki, Takanori*; Shiotani, Shinya*; Igawa, Naoki; Iwasaki, Kota*; Yoshino, Masahito*; Fukazawa, Hiroshi; Utsumi, Wataru
no journal, ,
We propose a new method, a difference maximum entropy method (MEM) analysis of the neutron diffraction data, for revealing the detailed structure around hydrogen atoms in proton-conducting oxides. This MEM analysis uses the difference between the structure factors of DO- and HO- dissolved crystals. Simulation for Ba(Sn,In)O -DO/HO demonstrate that it not only provides the distribution of hydrogen atoms alone, but also improves the spatial resolution of MEM mapping around hydrogen atoms.
O- and HO-dissolved Ba(Sn,In)O proton conductors, 2; Application to actual data and its evaluationShiotani, Shinya*; Nagasaki, Takanori*; Igawa, Naoki; Iwasaki, Kota*; Yoshino, Masahito*; Fukazawa, Hiroshi; Utsumi, Wataru
no journal, ,
A difference maximum entropy method (MEM) analysis was applied to actual neutron powder diffraction data of DO- and HO- dissolved Ba(Sn,In)O. It was found that a difference MEM analysis provided to be effective to improve the spatial resolution of MEM mapping for the structure around hydrogen atoms.
