skip to main content

Title: Inelastic x-ray scattering studies on dynamic structure factor of polymeric liquid Se under pressure

Inelastic X-ray scattering measurements at 25 MPa using synchrotron radiation were carried out for semiconducting liquid Se at high temperatures up to 1673 K. The excitation energy of the acoustic mode disperses approximately 10-50 % faster than the ultrasonic sound velocity in the observed temperature range while the ultrasonic sound rapidly slows down with increasing temperature. We carried out X-ray scattering measurements and found that the average coordination number at 1673 K is 1.3, indicating that the high temperature liquid consists of short chain molecules. These results suggest that weakening of the interatomic interaction is correlated with breaking of polymeric chain molecules.
Authors:
;  [1] ; ;  [2] ; ; ;  [3] ;  [4] ;  [5]
  1. Graduate School of Integrated Arts and Sciences, Hiroshima University, Higashi-Hiroshima, Hiroshima 739-8521 (Japan)
  2. Department of Physics, Kyoto University, Sakyoku, Kyoto 606-8502 (Japan)
  3. Japan Synchrotron Radiation Research Institute/SPring-8, Sayo-cho, Sayo-gun, Hyogo 679-5198 (Japan)
  4. RIKEN HARIMA BRANCH, Sayo-cho, Sayo-gun, Hyogo 679-5148 (Japan)
  5. (Japan)
Publication Date:
OSTI Identifier:
22488743
Resource Type:
Journal Article
Resource Relation:
Journal Name: AIP Conference Proceedings; Journal Volume: 1673; Journal Issue: 1; Conference: LAM-15: 15. international conference on liquid and amorphous metals, Beijing (China), 15-20 Sep 2013; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA)
Country of Publication:
United States
Language:
English
Subject:
75 CONDENSED MATTER PHYSICS, SUPERCONDUCTIVITY AND SUPERFLUIDITY; AUGMENTATION; COORDINATION NUMBER; EXCITATION; INELASTIC SCATTERING; LIQUIDS; MOLECULES; PRESSURE DEPENDENCE; SOUND WAVES; STRUCTURE FACTORS; SYNCHROTRON RADIATION; TEMPERATURE DEPENDENCE; VELOCITY; X-RAY DIFFRACTION