Direct observation of effective temperature of Ta atom in layer compound TaS2 by neutron resonance absorption spectrometer

Koji Tokuda, Takashi Kamiyama, Yoshiaki Kiyanagi, Raymond Moreh, Susumu Ikeda

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Abstract

A neutron resonance absorption spectrometer, DOG, has been installed at KENS, High Energy Accelerator Research Organization Neutron Source, which enables us to investigate the motions of a particular element by analyzing the line width of resonance absorption spectrum. We measured the temperature dependence of the effective temperature of Ta motion in TaS2 as well as in Ta metal using DOG. The effective temperatures extracted from the observed absorption spectrum agree well with the calculated values from the phonon density of states of Ta metal over a wide temperature range of 10 to 300 K. We also succeeded in measuring both the angular dependence and the temperature dependence of effective temperatures of Ta in a layer compound TaS2. Based on the temperature dependence of the effective temperature, the partial phonon density of states of Ta in TaS2 was discussed.

Original languageEnglish
Pages (from-to)1504-1507
Number of pages4
JournalJapanese Journal of Applied Physics, Part 2: Letters
Volume40
Issue number3 A
DOIs
StatePublished - 1 Jan 2001

Keywords

  • Effective temperature
  • Neutron
  • Phonon density of states
  • Resonance absorption
  • Ta
  • TaS

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