Optic-type Vibrational Modes of Liquid Chalcogens

We carried out inelastic neutron scattering (INS) measurements to study the dynamic structure of liquid (l-) Se and Te50Se50. The bond-stretching modes for both liquids were found to lie in higher energies than those forming a trigonal phase, showing that the chainlike molecules are more isolated th...

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Bibliographic Details
Published inJournal of neutron research Vol. 12; no. 4; pp. 301 - 304
Main Authors Chiba, Ayano, Ohmasa, Yoshinori, Yao, Makoto, Bennington, Stephen M.
Format Journal Article
LanguageEnglish
Published London, England SAGE Publications 2004
Subjects
Dynamic structure factor
Selenium
Optic-type mode
Tellurium
Liquid chalcogens
Inelastic neutron scattering
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Summary:We carried out inelastic neutron scattering (INS) measurements to study the dynamic structure of liquid (l-) Se and Te50Se50. The bond-stretching modes for both liquids were found to lie in higher energies than those forming a trigonal phase, showing that the chainlike molecules are more isolated than in the trigonal phase. The Q-dependence of the intensity of the dynamic structure factor was examined at the region of the stretching modes, and found to be explained by a simple model where we assumed completely out-of-phase motions of two atoms. The result shows the possibilities of extracting short-range structural information from such Q-dependences for these kinds of basically isolated molecules.
ISSN:1023-8166
1477-2655
DOI:10.1080/10238160412331299483