Analysis of the optic-type collective mode in liquid selenium to determine the local structure

  • Chiba A
  • Ohmasa Y
  • Bennington S
 et al. 
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Abstract

We have performed inelastic neutron scattering measurements for liquid selenium to investigate the dynamic structure, S(Q,E), of the chainlike molecules in the liquid state. We observed a distinct optic-type mode at around 31 meV, whose Q dependence of the intensity, S(Q,E similar to 31 meV), was found to be reproduced by a simple approximation of "three-body" model. We propose the possibility of extracting structural parameters such as bond length and angle by constant E spectra by the use of this simple model, which at the same time provides us a clearcut physical meaning of the Q dependences.

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Authors

  • Ayano Chiba

  • Yoshinori Ohmasa

  • Stephen M. Bennington

  • Jon W. Taylor

  • Makoto Yao

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