Structural basis for the fast phase change of GeSbTe; Ring statistics analogy between the crystal and amorphous states

Kohara, Shinji*; Kato, Kenichi*; Kimura, Shigeru*; Tanaka, Hitoshi*; Usuki, Takeshi*; Suzuya, Kentaro; Tanaka, Hiroshi*; Moritomo, Yutaka*; Matsunaga, Toshiyuki*; Yamada, Noboru*; et al.

Applied Physics Letters, 89(20), p.201910_1 - 201910_3, 2006/11

https://doi.org/10.1063/1.2387870

The three-dimensional atomic configuration of amorphous GeSbTe were derived by reverse Monte Carlo simulation with synchrotron-radiation X-ray diffraction data. The authors found that amorphous GeSbTe can be regarded as "even-numbered ring structure", because the ring statistics is dominated by four- and six-fold rings analogous to the crystal phase. On the other hand, the formation of Ge-Ge homopolar bonds in amorphous GeTe constructs both odd- and even-numbered rings. They believe that the unusual ring statistics of amorphous GeSbTe is the key for the fast crystallization speed of the material.

Impurity status of dee-shaped discharges in Doublet III with inconel wall and limiters-with and without titanium gettering; Doublet-III experimental report

; ; ; ; ; ; ; Ohara, Yoshihiro; ; G.L.Jahns*; et al.

JAERI-M 9181, 27 Pages, 1980/11

JAERI-M-9181.pdf:0.87MB

no abstracts in English

JFT-2 Tokamak Neutral Injector and Preliminary Results of Additional Heating Experiment

; ; ; ; ; ; ; ; ; ; et al.

JAERI-M 7043, 27 Pages, 1977/04

JAERI-M-7043.pdf:0.58MB

no abstracts in English

Earthquake response analysis of a mine rubble deposit sites using NMM+DDA coupled analysis

Horikawa, Shigeo*; Sasaki, Takeshi*; Koshigai, Masaru*; Fukushima, Shigeru; Ohara, Yoshiyuki

no journal, , 

Groundwater colloid properties in sedimentary rocks; Preliminary results from the Horonobe URL

Sasamoto, Hiroshi; Ohara, Shigeru*

no journal, , 

In the present study, a non-destructive technique using Particle Tracking Analysis (PTA) has been tested to determine size distribution and concentration of colloids in groundwater. The groundwaters were sampled from water-rings (4 samples) located in the vertical shafts and boreholes (6 samples) drilled in the drifts of the Horonobe URL. Results suggest that colloid particle concentrations range from 9.110 to 7.810 particle/mL (pt/mL) and the estimated colloid mass concentrations range from 3.410 to 4.2 mg/L for the diameter of 1 to 1000 nm, respectively. Colloid concentrations of groundwater sampled from water-rings are generally higher than those sampled from boreholes due to differences in groundwater sampling conditions. For sizes 100 nm of particles, colloid stability was evaluated on the basis of DLVO theory. DLVO theory predicts that particle sizes 100 nm would be unstable (i.e., coagulation could occur). Particle and mass colloid concentrations in the groundwater were therefore reevaluated to obtain the reliable colloid particle concentrations range from 5.810 to 3.010 pt/mL and colloid mass concentrations range from 2.010 to 1.310 mg/L for the diameter range 100 nm, respectively. Furthermore, the reevaluated results indicate a negative correlation between colloid concentrations and IS of groundwater.

Seismic response analysis of tailing dam foundation on discontinuous rock masses and counter measure design

Sasaki, Takeshi*; Koshigai, Masaru*; Horikawa, Shigeo*; Fukushima, Shigeru; Ohara, Yoshiyuki

no journal, ,