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H
isomersMakochekanwa, C.*; Kato, Hidetoshi*; Hoshino, Masamitsu*; Tanaka, Hiroshi*; Kubo, Hirotaka; Bettega, M. H. F.*; Lopes, A. R.*; Lima, M. A. P.*; Ferreira, L. G.*
Journal of Chemical Physics, 124(2), p.024323_1 - 024323_9, 2006/00
Times Cited Count：16 Percentile：48.25(Chemistry, Physical)no abstracts in English
Sakai, Seiji; Naramoto, Hiroshi; Xu, Y.; Priyanto, T. H.; Lavrentiev, V.; Narumi, Kazumasa
Materials Research Society Symposium Proceedings, Vol.788, p.L11.49.1 - L11.49.6, 2004/00
Mixture films between cobalt and C
(CoxC, x = 0.5-700) were prepared by co-evaporation technique under UHV conditions. The composition-dependent features of dilatation and downshift of Raman peak suggest that the mixtures are composed of cobalt particles and a C-based phase in which certain number of cobalt atoms are coordinated with C molecules. It is deduced that the equilibrated number of cobalt atoms in the C-based phase is 4 atoms per C molecule and in which an electron transfer occurs from a cobalt atom to a C molecule. The evaluation of their temperature dependences reveals that: (1) The mixtures with x 
4 are thermally activated-type, and their conductive nature can be attributed to the C-based phase. Further (2) the mixtures between 4 
x 60 are also thermally activated, however, the electron hopping process between the isolated cobalt particles is supposed to be operative (variable-range-hopping). And (3) in the mixtures with x 
60 which corresponds to a percolation threshold for cobalt particles, the system changes into metallic conduction.
Ogawa, Hiroaki*; Kiuchi, Kiyoshi
JAERI-Research 2002-037, 48 Pages, 2002/12
JAERI-Research-2002-037.pdf:2.57MB
The difference in hydrogen permeation among candidate cladding materials such as 25Cr-35Ni stainless steel, Nb liner and reference materials such as 18Cr-8Ni SS, and Zr of Zircaloy base metal were evaluated by low energy plasma permeation simulated to hydrogen excited by heavy neutron irradiation. RF excitation source was arranged for the experimental apparatus in cooperating with temperature and bias control. Comparing with the thermodynamic gas driven permeation (GDP) in the same hydrogen pressure, the hydrogen permeation rate by the plasma driven permeation (PDP) was markedly accelerated at low to medium temperature range. The temperature dependency showed a knick at around 530K due to hydrogen-defect interactions. Comparing with Zr, Nb showed the high hydrogen solubility without the degradation by hydrate formation that is required to a getter material. The difference in PDP among candidates was analyzed with a new dissolution model for hydrogen.
Kojima, Takuji; Sunaga, Hiromi; Tachibana, Hiroyuki; Takizawa, Haruki; Tanaka, Ryuichi
IAEA-TECDOC-156, p.91 - 98, 2000/06
no abstracts in English
Kojima, Takuji; Tachibana, Hiroyuki; Haruyama, Yasuyuki; *
Hoshasen Kagaku, (66), p.47 - 49, 1998/00
no abstracts in English
Matsuda, Koji; *; *; *; Hatada, Motoyoshi
Applied Radiation and Isotopes, 42(12), p.1223 - 1229, 1991/00
no abstracts in English
; ;
J.Chem.Soc.,Faraday Trans.,I, 79, p.1973 - 1986, 1983/00
no abstracts in English
