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Browsing by Author Tong, Sy Tien

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  • Anharmonic effective potential and XAFS cumulants for hcp crystals containing dopant atom

    • Authors: Nguyen, Van Hung; Le, Thi Thuy Hau; Tong, Sy Tien (2007)

  • A new procedure for calculation and analysis of XAFS (X-ray Absorption Fine Structure) cumulants of hep crystals containing dopant atom has been derived based on quantum statistical theory with generalized anharmonic correlated Einstein model. Analytical expressions for effective local force constants, correlated Einstein frequency and temperature, first cumulant or net thermal expansion, second cumulant or Debye Waller factor and third cumulant of hep crystals containing dopant atom have been derived. Morse potential parameters of pure crystals and those with dopant included in the derived expressions have been calculated. Numerical results for Zn doped by Cd are found to be in good ...
  • 123.pdf.jpg
  • Article

  • Anharmonic effective potential, thermodynamic parameters, and EXAFS of hep crystals

    • Authors: Nguyen, Van Hung; Ngo, Trong Hai; Tong, Sy Tien; Le, Hai Hung (2009)

  • Anharmonic effective potential, effective local force constant, thermal expansion coefficient, three leading cumulants, and EXAFS (Extended X-ray Absorption Fine Structure) of hep crystals have been studied. Analytical expressions for these quantities have been derived. Numerical calculations have been carried out for Zn and Cd. They show a good agreement with experiment results measured at HASYLAB (DESY, Germany) and unnegligible anharmonic effects in the considered quantities.

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Browsing by Author Tong, Sy Tien

Jump to: 0-9 A B C D E F G H I J K L M N O P Q R S T U V W X Y Z
or enter first few letters:  
Showing results 1 to 2 of 2
  • 170.pdf.jpg
  • Article

  • Anharmonic effective potential and XAFS cumulants for hcp crystals containing dopant atom

    • Authors: Nguyen, Van Hung; Le, Thi Thuy Hau; Tong, Sy Tien (2007)

  • A new procedure for calculation and analysis of XAFS (X-ray Absorption Fine Structure) cumulants of hep crystals containing dopant atom has been derived based on quantum statistical theory with generalized anharmonic correlated Einstein model. Analytical expressions for effective local force constants, correlated Einstein frequency and temperature, first cumulant or net thermal expansion, second cumulant or Debye Waller factor and third cumulant of hep crystals containing dopant atom have been derived. Morse potential parameters of pure crystals and those with dopant included in the derived expressions have been calculated. Numerical results for Zn doped by Cd are found to be in good ...
  • 123.pdf.jpg
  • Article

  • Anharmonic effective potential, thermodynamic parameters, and EXAFS of hep crystals

    • Authors: Nguyen, Van Hung; Ngo, Trong Hai; Tong, Sy Tien; Le, Hai Hung (2009)

  • Anharmonic effective potential, effective local force constant, thermal expansion coefficient, three leading cumulants, and EXAFS (Extended X-ray Absorption Fine Structure) of hep crystals have been studied. Analytical expressions for these quantities have been derived. Numerical calculations have been carried out for Zn and Cd. They show a good agreement with experiment results measured at HASYLAB (DESY, Germany) and unnegligible anharmonic effects in the considered quantities.