JAEA
  • help
  • PC | SP
  • JP | EN
          
Refine your search：     
Report No.
 - 
Clear All
Search Results: Records 1-4 displayed on this page of 4
  • 1

Presentation/Publication Type

Initialising ...

Refine

Journal/Book Title

Initialising ...

Meeting title

Initialising ...

First Author

Initialising ...

Keyword

Initialising ...

Language

Initialising ...

Publication Year

Initialising ...

Held year of conference

Initialising ...

Save select records

Journal Articles

Precise structural analyses of advanced materials under high-pressure and high-temperature

Yoshiasa, Akira*; Murai, Keiichiro*; Arima, Hiroshi*; Katayama, Yoshinori

International Journal of Modern Physics B, 25(31), p.4159 - 4162, 2011/12

https://doi.org/10.1142/S0217979211066489
 Times Cited Count：0 Percentile：0.01(Physics, Applied)

Precise structure analyses of advanced materials under pressure were performed using each advantage of X-ray absorption fine structure (XAFS) and diffraction methods. Measurements were performed in-situ under pressure and temperature using a large-volume multi-anvil pressure apparatus and synchrotron radiation. XAFS spectra are useful for phase study under high temperature and high pressure. The XAFS Debye-Waller factor provides anharmonic effective pair potential with a pressure-dependent and temperature-independent shape. The phonon energies and anharmonicity are affected largely by the change in local structure and bonding character.

Journal Articles

XAFS study of GeO$$_{2}$$ glass under pressure

Otaka, Osamu*; Yoshiasa, Akira*; Fukui, Hiroyuki*; Murai, Keiichiro*; Okube, Maki*; Takebe, Hitoshi*; Katayama, Yoshinori; Utsumi, Wataru

Journal of Physics; Condensed Matter, 14(44), p.10521 - 10524, 2002/11

https://doi.org/10.1088/0953-8984/14/44/326
 Times Cited Count：18 Percentile：64.23(Physics, Condensed Matter)

no abstracts in English

Journal Articles

Pressure dependence of effective pair potentials in AgBr determined by extended X-ray absorption fine structure

Yoshiasa, Akira*; Murai, Keiichiro*; Nagai, Takaya*; Katayama, Yoshinori

Japanese Journal of Applied Physics, Part 1, 40(4A), p.2395 - 2398, 2001/04

https://doi.org/10.1143/JJAP.40.2395
 Times Cited Count：5 Percentile：26.32(Physics, Applied)

The pressure dependence of extended X-ray absorption fine structure (EXAFS) Debye-Waller factors in AgBr has been investigated using the cumulant expansion method. The Br K-edge EXAFS spectra were measured in the transmission mode under high pressure ($$leq$$9.1GPa) at room temperature using a cubic anvil type apparatus (MAX90) and synchrotron radiation from the Photon Factory, Tsukuba. The effective pair potentials $$V(u)=au^{2}/2+bu^{3}/3!$$, were evaluated and the potential coefficient $$a$$ at 2.1, 4.2 and 6.1GPa are 1.59(4), 1.75(4) and 1.91(4) eV/$$AA^{-2}$$, respectively. The energies of the third-order anharmonic potential coefficient $$b$$ maintain nearly constant values with pressure though the third-order cumulant $$sigma_{3}$$ decreases with increasing in pressure.

Journal Articles

Structual changes of quartz-type crystalline and vitreous GeO$$_{2}$$ under pressure

Otaka, Osamu*; Yoshiasa, Akira*; Fukui, Hiroyuki*; Murai, Keiichiro*; Okube, Maki*; Katayama, Yoshinori; Utsumi, Wataru; Nishihata, Yasuo

Journal of Synchrotron Radiation, 8(Part2), p.791 - 793, 2001/03

no abstracts in English

4 (Records 1-4 displayed on this page)
  • 1