Slow dynamics in glycerol: collective de gennes narrowing and independent angstrom motion

Makina Saito, Yasuhiro Kobayashi, Ryo Masuda, Masayuki Kurokuzu, Shinji Kitao, Yoshitaka Yoda, Makoto Seto

研究成果: Article査読

3 被引用数 (Scopus)

抄録

The slow dynamics of microscopic density correlations in supercooled glycerol was studied by time-domain interferometry using 57Fe-nuclear resonant scattering gamma rays of synchrotron radiation. The dependence of the relaxation time at 250 K on the momentum transfer q is maximum near the first peak of the static structure factor S(q) at q ∼ 15 nm −1. The q-dependent behavior of the relaxation time known as de Gennes narrowing was confirmed in glycerol. Conversely, de Gennes narrowing around the second and third peaks of S(q) at q ∼ 26 nm −1 and 54 nm −1 was not detected. The q dependence of the relaxation time was found to follow a power-law equation with power-law index of 1.9(2) in the q region well above the first peak of S(q) up to ∼ 60 nm −1, which corresponds to angstrom scale, within experimental error. This suggests that in the angstrom-scale dynamics of supercooled glycerol, independent motions dominate over collective motion.

本文言語English
論文番号22
ページ(範囲)1-8
ページ数8
ジャーナルHyperfine Interactions
237
1
DOI
出版ステータスPublished - 2016 12月 1
外部発表はい

ASJC Scopus subject areas

  • 原子分子物理学および光学
  • 核物理学および高エネルギー物理学
  • 凝縮系物理学
  • 物理化学および理論化学

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