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Correlation effects among thermal displacements of atoms in KBr

中性子散漫散乱測定よるKBr中の原子熱変位の相関効果

佐久間 隆*; Xianglian*; 清水 識文*; Mohapatra, S. R.*; 磯崎 信宏*; 上原 寛之*; 高橋 東之*; Basar, K.*; 井川 直樹   ; 神嶋 修*

Sakuma, Takashi*; Xianglian*; Shimizu, Norifumi*; Mohapatra, S. R.*; Isozaki, Nobuhiro*; Uehara, Hiroyuki*; Takahashi, Haruyuki*; Basar, K.*; Igawa, Naoki; Kamishima, Osamu*

第3近接原子までの熱変位による相関効果を用いてKBr粉末の中性子散漫散乱を解析した。KBrの散漫散乱の振動項は、その他のイオン結晶と同様に第1,第2及び第3近接元素間の熱変位による相関効果によって説明でき、これら相関効果から、第1,第2及び第3近接元素間の力定数は各々0.83eV/$AA $^{2}$$, 0.50eV/$AA $^{2}$$, 0.41eV/$AA $^{2}$$と求めることができた。

Diffuse neutron scattering measurements have been performed on powder KBr. The oscillatory scheme of the diffuse scattering intensity is explained by the values of correlation effects among thermal displacements of 1st, 2nd and 3rd nearest neighboring atoms which are almost the same as those in other ionic crystals. Force constants among 1st, 2nd and 3rd nearest neighboring atoms are obtained from the correlation effects at 90 K are 0.83 eV/$AA $^{2}$$, 0.50 eV/$AA $^{2}$$ and 0.41 eV/$AA $^{2}$$, respectively.

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パーセンタイル:48.1

分野:Chemistry, Physical

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