| EPSRC Reference: |
GR/N18796/01 |
| Title: |
PHONON DYNAMICS IN AN ANISOTROPIC DISTRIBUTION |
| Principal Investigator: |
Wyatt, Professor A |
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| Department: |
Physics |
| Organisation: |
University of Exeter |
| Scheme: |
Standard Research (Pre-FEC) |
| Starts: |
23 October 2000 |
Ends: |
22 April 2002 |
Value (£): |
14,270
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| No relevance to Underpinning Sectors |
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Summary on Grant Application Form |
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We have discovered a remarkable dynamic system in which high energy excitations are created from a low temperature cloud of excitations. This astonishing result was first extracted experimental measurements on liquid helium and since then we have developed a goo by which we can consider the various ramifications of this phenomena. This new arises because we create exciatons that only occupy a small solid angle in momentum and this coupled with strongly anisotropic interactions makes it qualitatively different usual isotropic case. One of the more spectacular predictions is that supra thermal den high energy excitations are formed. We know of no other system in physics wl happens. However we see no reason why this cannot occur in other systems and we believe our work will encourage others to search for this effect elsewhere. This application is to our model and do the detailed calculations of the interactions which are needed quantitative evaluation of the various predictions of the model We also plan to start a nt on how rotons are created in liquid helium.Keywords afescrib. researcfr ar+ea . of proposal.................................. ......_........_..__........ ... .._. .. ......... ..... .._ ... ......................... ...................Keywords phonon dynamics in anisotropic distributions, phonon-phonon scattering, spatio-tempor evolution of phonon beams, liquid `He.
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Key Findings |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Potential use in non-academic contexts |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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Impacts |
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| Description |
This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk |
| Summary |
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Sectors submitted by the Researcher |
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This information can now be found on Gateway to Research (GtR) http://gtr.rcuk.ac.uk
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| Project URL: |
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| Further Information: |
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| Organisation Website: |
http://www.ex.ac.uk |