DOI > 10.5291/ILL-DATA.6-01-324

This proposal is publicly available since 03/25/2018

Title

High energy resolution density fluctuations spectrum in 4He hcp

Abstract

Our recent successful measurement performed last December on IN5 of the density fluctuation spectrum of a single crystal of 4He at moderate energy resolution demonstrates the great interest of measuring the dynamic of such quantum crystal where anharmonicity plays a crucial role. The full vision of the reciprocal space allowed by the IN5 instrument constitutes a formidable tool to investigate this dynamics. In the proposed experiment we plan to extends the previous measurements with a higher energy resolution for the low energy range. Both measurements will compose a set of data of invaluable quality to tackle mysteries such as the supersolidity in this material.

Experimental Report

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Data Citation

The recommended format for citing this dataset in a research publication is in the following format:

OLLIVIER Jacques; BOSSY Jacques; GLYDE Henry; SCHOBER Helmut and SPATHIS Panayotis. (2013). High energy resolution density fluctuations spectrum in 4He hcp. Institut Laue-Langevin (ILL) doi:10.5291/ILL-DATA.6-01-324

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Metadata

Experiment Parameters

  • Environment temperature

    0.3-1.0 K (+/-0.1K)
  • Experiment energy

    5.1meV/4.0A
  • Experiment res energy

    0.1meV elastic

Sample Parameters

  • Formula

    • Helium 4
  • Consistence

    single crystal
  • Size

    3500
  • Space

    P6_3/mmc
  • Unit cell A

    3.67
  • Unit cell B

    3.67
  • Unit cell C

    5.92
  • Container

    cylinder