Zobrazeno 1 - 10
of 10
pro vyhledávání: '"Hiroki Yonezawa"'
Publikováno v:
Journal of Radioanalytical and Nuclear Chemistry Articles. 207:413-423
Oxygen was determined in three kinds of ZrF4-based fluoride glass [ZrF4−BaF2−GdF3−AlF3 (ZBGA), ZrF4−BaF2−LaF3−YF3−AlF3−LiF−NaF (ZBLYALN) and ZrF4−BaF2−LaF3−YF3−AlF3−LiF (ZBLYAL)] used for fabricating optical fiberby18O(p,
Publikováno v:
Journal of Radioanalytical and Nuclear Chemistry Articles. 185:83-90
A simplified method for the substoichiometric analysis of phosphorus has been developed and applied to determine the concentration distribution of phosphorus in the region of a SiO2−Si interface in order to explain why phosphorus is lost from the i
Publikováno v:
Journal of Radioanalytical and Nuclear Chemistry Articles. 173:409-417
The charged particle activation analysis of ultra-trace carbon in boron-doped silicon with the12C(d,n)13N reaction has been developed. In order to apply13N substoichiometric separation to determine carbon in silicon, we studied the rapid dissolution
Publikováno v:
Japanese Journal of Applied Physics. 31:L210
Low-temperature oxidation kinetics in the Au/Si and Cu/Si systems was measured by a 7-MeV alpha backscattering technique. The formation of a Si oxide layer near the surface in the Au/Si system is mainly controlled by intermixing between the Au and Si
Publikováno v:
Journal of Radioanalytical and Nuclear Chemistry Letters. 119:433-440
Carrier-free88Y radioisotope, which has the longest half life /T=106.6 d/ of yttrium radioisotopes and is a γ-ray emitter, was obtained by proton irradiation of strontium, followed by cooling for one month. Then,88Y was purified by precipitating str
Publikováno v:
Journal of Radioanalytical and Nuclear Chemistry Articles. 102:359-368
The composition of superconducting oxide, BaPb1−xBixO3 (BPB), was analyzed in order to decide the accurate x value. Oxygen and barium were determined non-destructively by3He and neutron activation analysis. Lead and bismuth were determined by subst
Publikováno v:
Journal of Radioanalytical and Nuclear Chemistry Letters. 105:1-6
The radiochemical separation of nitrogen was studied for the determination of ultra trace carbon in gallium arsenide by deutron activation analysis using the12C/d, n/13N reaction. It is based on steam distillation as ammonia and successive substoichi
Publikováno v:
Journal of Radioanalytical and Nuclear Chemistry Articles. 111:51-61
Ultra trace carbon in gallium arsenide has been determined by deuteron activation analysis. It consists of steam distillation of nitrogen as ammonia and successive substoichiometric precipitation as ammonium tetraphenylborate. It is confirmed that ni
Publikováno v:
MRS Proceedings. 156
High energy Ion backscattering analysis in combination with recently-developed resonance scattering analysis Is described, with a stress on precise and quantitative oxygen analysis and its successful application to the characterization and quality es
Autor:
Seiko Mitachi, Hiroki Yonezawa, Toshio Shigematsu, Shiro Takahashi, Shigeki Sakaguchi, Kohji Shikano
Publikováno v:
Japanese Journal of Applied Physics. 24:L827
To clarify the cause of scattering loss in fluoride optical fibers, oxygen content in fibers having various loss values is analyzed by activation analysis using a cyclotron. It is found that fibers with higher loss contain a higher oxygen content. It